diff --git a/onert-micro/onert-micro/include/pal/common/PALSubCommon.h b/onert-micro/onert-micro/include/pal/common/PALSubCommon.h
index 1df3370c020..62964a51f56 100644
--- a/onert-micro/onert-micro/include/pal/common/PALSubCommon.h
+++ b/onert-micro/onert-micro/include/pal/common/PALSubCommon.h
@@ -25,6 +25,26 @@ namespace execute
 {
 namespace pal
 {
+
+int8_t SubFunc(int8_t x, int8_t y, const core::ArithmeticQuantParams &params)
+{
+  const int32_t input1_val = params.input1_offset + x;
+  const int32_t input2_val = params.input2_offset + y;
+  const int32_t shifted_input1_val = input1_val * (1 << params.left_shift);
+  const int32_t shifted_input2_val = input2_val * (1 << params.left_shift);
+  const int32_t scaled_input1_val = multiplyByQuantizedMultiplierSmallerThanOneExp(
+    shifted_input1_val, params.input1_multiplier, params.input1_shift);
+  const int32_t scaled_input2_val = multiplyByQuantizedMultiplierSmallerThanOneExp(
+    shifted_input2_val, params.input2_multiplier, params.input2_shift);
+  const int32_t raw_sum = scaled_input1_val - scaled_input2_val;
+  const int32_t raw_output = multiplyByQuantizedMultiplierSmallerThanOneExp(
+                               raw_sum, params.output_multiplier, params.output_shift) +
+                             params.output_offset;
+  const int32_t clamped_output = std::min(params.quantized_activation_max,
+                                          std::max(params.quantized_activation_min, raw_output));
+  return static_cast<int8_t>(clamped_output);
+}
+
 template <typename T>
 OMStatus Sub(const core::BinaryArithmeticBroadcastParams &params, const int flat_size,
              const T *input1_data, const T *input2_data, T *output_data)
@@ -44,6 +64,16 @@ OMStatus BroadcastSub4DSlow(const core::BinaryArithmeticBroadcastParams &params,
   return Ok;
 }
 
+OMStatus BroadcastSub4DSlow(const core::ArithmeticQuantParams &params,
+                            const core::OMRuntimeShape &input1_shape, const int8_t *input1_data,
+                            const core::OMRuntimeShape &input2_shape, const int8_t *input2_data,
+                            const core::OMRuntimeShape &output_shape, int8_t *output_data)
+{
+  BroadcastBinaryFunction6DSlow(params, input1_shape, input1_data, input2_shape, input2_data,
+                                output_shape, output_data, SubFunc);
+  return Ok;
+}
+
 } // namespace pal
 } // namespace execute
 } // namespace onert_micro
diff --git a/onert-micro/onert-micro/include/pal/mcu/PALSub.h b/onert-micro/onert-micro/include/pal/mcu/PALSub.h
index a3bd4b7368a..60c5fb6eac8 100644
--- a/onert-micro/onert-micro/include/pal/mcu/PALSub.h
+++ b/onert-micro/onert-micro/include/pal/mcu/PALSub.h
@@ -19,5 +19,24 @@
 #define ONERT_MICRO_EXECUTE_PAL_SUB_H
 
 #include "PALSubCommon.h"
+#include "PALUtils.h"
+
+namespace onert_micro
+{
+namespace execute
+{
+namespace pal
+{
+
+OMStatus Sub(const core::ArithmeticQuantParams &params, const uint32_t flat_size,
+             const int8_t *input1_data, const int8_t *input2_data, int8_t *output_data)
+{
+  ElementWise(flat_size, params, input1_data, input2_data, output_data, SubFunc);
+  return Ok;
+}
+
+} // namespace pal
+} // namespace execute
+} // namespace onert_micro
 
 #endif // ONERT_MICRO_EXECUTE_PAL_MUL_H
diff --git a/onert-micro/onert-micro/include/test_models/sub/S8SubKernel.h b/onert-micro/onert-micro/include/test_models/sub/S8SubKernel.h
new file mode 100644
index 00000000000..276ba9eb1b9
--- /dev/null
+++ b/onert-micro/onert-micro/include/test_models/sub/S8SubKernel.h
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2024 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ONERT_MICRO_TEST_MODELS_SUB_KERNEL_S8_H
+#define ONERT_MICRO_TEST_MODELS_SUB_KERNEL_S8_H
+
+#include "TestDataSubBase.h"
+
+namespace onert_micro
+{
+namespace test_model
+{
+namespace sub_s8_no_broadcasting
+{
+
+/*
+ * Sub Kernel:
+ *
+ * Input_1(2, 2)   Input_2(2, 2)
+ *       \             /
+ *     Sub(w/o broadcast)
+ *              |
+ *          Output(2, 2)
+ */
+
+unsigned char test_kernel_model_circle[] = {
+  0x18, 0x00, 0x00, 0x00, 0x43, 0x49, 0x52, 0x30, 0x00, 0x00, 0x0e, 0x00, 0x14, 0x00, 0x00, 0x00,
+  0x0c, 0x00, 0x08, 0x00, 0x10, 0x00, 0x04, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00,
+  0x30, 0x00, 0x00, 0x00, 0x44, 0x02, 0x00, 0x00, 0x60, 0x02, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
+  0x1c, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
+  0x88, 0xff, 0xff, 0xff, 0x8c, 0xff, 0xff, 0xff, 0x90, 0xff, 0xff, 0xff, 0x94, 0xff, 0xff, 0xff,
+  0x01, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x18, 0x00, 0x14, 0x00,
+  0x10, 0x00, 0x0c, 0x00, 0x08, 0x00, 0x04, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00,
+  0x1c, 0x00, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, 0x64, 0x00, 0x00, 0x00, 0x6c, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0x6d, 0x61, 0x69, 0x6e, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x14, 0x00, 0x00, 0x00, 0x10, 0x00, 0x0c, 0x00,
+  0x07, 0x00, 0x08, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1c, 0x10, 0x00, 0x00, 0x00,
+  0x10, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x04, 0x00, 0x04, 0x00, 0x04, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00,
+  0x78, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x1a, 0xff, 0xff, 0xff, 0x14, 0x00, 0x00, 0x00,
+  0x4c, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, 0x48, 0x00, 0x00, 0x00,
+  0x0c, 0xff, 0xff, 0xff, 0x30, 0x00, 0x00, 0x00, 0x24, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x3f, 0x01, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0xfe, 0x42, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc3, 0x03, 0x00, 0x00, 0x00,
+  0x6f, 0x66, 0x6d, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x02, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x8a, 0xff, 0xff, 0xff, 0x14, 0x00, 0x00, 0x00,
+  0x4c, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, 0x4c, 0x00, 0x00, 0x00,
+  0x7c, 0xff, 0xff, 0xff, 0x30, 0x00, 0x00, 0x00, 0x24, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x3f, 0x01, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0xfe, 0x42, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc3, 0x04, 0x00, 0x00, 0x00,
+  0x69, 0x66, 0x6d, 0x32, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00,
+  0x18, 0x00, 0x14, 0x00, 0x13, 0x00, 0x0c, 0x00, 0x08, 0x00, 0x04, 0x00, 0x0e, 0x00, 0x00, 0x00,
+  0x20, 0x00, 0x00, 0x00, 0x54, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09,
+  0x54, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x14, 0x00, 0x04, 0x00, 0x08, 0x00, 0x0c, 0x00, 0x10, 0x00,
+  0x0c, 0x00, 0x00, 0x00, 0x2c, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x3f, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x42,
+  0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc3, 0x04, 0x00, 0x00, 0x00, 0x69, 0x66, 0x6d, 0x31,
+  0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0x02, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00,
+  0x0c, 0x00, 0x0c, 0x00, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x0c, 0x00, 0x00, 0x00,
+  0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x29, 0x11, 0x00, 0x00, 0x00, 0x4f, 0x4e, 0x45, 0x2d,
+  0x74, 0x66, 0x6c, 0x69, 0x74, 0x65, 0x32, 0x63, 0x69, 0x72, 0x63, 0x6c, 0x65, 0x00, 0x00, 0x00};
+std::vector<int8_t> input1_data = {
+  5,
+  7,
+  13,
+  -3,
+};
+std::vector<int8_t> input2_data = {-5, -11, 5, 5};
+std::vector<int8_t> reference_output_data = {10, 18, 8, -8};
+} // namespace sub_s8_no_broadcasting
+
+class TestDataS8Sub : public TestDataSubBase<int8_t>
+{
+public:
+  explicit TestDataS8Sub(bool is_with_broadcast) : TestDataSubBase<int8_t>(is_with_broadcast)
+  {
+    if (is_with_broadcast)
+    {
+      std::cerr << ("Sub S8 with broadcasting not supported yet!\n");
+    }
+    else
+    {
+      _input1_data = sub_s8_no_broadcasting::input1_data;
+      _input2_data = sub_s8_no_broadcasting::input2_data;
+      _reference_output_data = sub_s8_no_broadcasting::reference_output_data;
+      _test_kernel_model_circle = sub_s8_no_broadcasting::test_kernel_model_circle;
+    }
+  }
+
+  ~TestDataS8Sub() override = default;
+};
+
+} // namespace test_model
+} // namespace onert_micro
+
+#endif // ONERT_MICRO_TEST_MODELS_SUB_KERNEL_S8_H
diff --git a/onert-micro/onert-micro/src/execute/kernels/Sub.cpp b/onert-micro/onert-micro/src/execute/kernels/Sub.cpp
index 6e32e88f3b2..788eb6813e0 100644
--- a/onert-micro/onert-micro/src/execute/kernels/Sub.cpp
+++ b/onert-micro/onert-micro/src/execute/kernels/Sub.cpp
@@ -38,6 +38,50 @@ constexpr uint32_t input1TensorIdx = 0;
 constexpr uint32_t input2TensorIdx = 1;
 constexpr uint32_t outputTensorIdx = 0;
 
+void calculateQuantParams(core::ArithmeticQuantParams &params, const circle::Tensor *input1,
+                          const circle::Tensor *input2, const circle::Tensor *output,
+                          circle::ActivationFunctionType act)
+{
+  long input1_zp;
+  long input2_zp;
+  long output_zp;
+
+  float input1_scale;
+  float input2_scale;
+  float output_scale;
+
+  // Read input1 quant params
+  readQuantParams(input1, input1_zp, input1_scale);
+  // Read input2 quant params
+  readQuantParams(input2, input2_zp, input2_scale);
+  // Read output quant params
+  readQuantParams(output, output_zp, output_scale);
+
+  params.input1_offset = -static_cast<int32_t>(input1_zp);
+  params.input2_offset = -static_cast<int32_t>(input2_zp);
+  params.output_offset = static_cast<int32_t>(output_zp);
+  params.left_shift = (output->type() == circle::TensorType_INT16) ? 15 : 20;
+  const double twice_max_input_scale =
+    2 * static_cast<double>(std::max(input1_scale, input2_scale));
+  const double real_input1_multiplier = static_cast<double>(input1_scale) / twice_max_input_scale;
+  const double real_input2_multiplier = static_cast<double>(input2_scale) / twice_max_input_scale;
+  const double real_output_multiplier =
+    twice_max_input_scale / ((1 << params.left_shift) * static_cast<double>(output_scale));
+
+  quantizeMultiplierSmallerThanOneExp(real_input1_multiplier, &params.input1_multiplier,
+                                      &params.input1_shift);
+
+  quantizeMultiplierSmallerThanOneExp(real_input2_multiplier, &params.input2_multiplier,
+                                      &params.input2_shift);
+
+  quantizeMultiplierSmallerThanOneExp(real_output_multiplier, &params.output_multiplier,
+                                      &params.output_shift);
+
+  calculateActivationRangeQuantized(act, output_zp, output_scale, output->type(),
+                                    &params.quantized_activation_min,
+                                    &params.quantized_activation_max);
+}
+
 } // namespace
 
 // NOTE: doesnt currently support dynamic shapes
@@ -160,6 +204,31 @@ OMStatus onert_micro::execute::execute_kernel_CircleSub(const OMExecuteArgs &exe
     }
     break;
 #endif // DIS_FLOAT
+#ifndef DIS_QUANT
+    case circle::TensorType_INT8:
+    {
+      core::ArithmeticQuantParams sub_params{};
+
+      calculateQuantParams(sub_params, input1, input2, output,
+                           options->fused_activation_function());
+
+      if (need_broadcast)
+      {
+        status = pal::BroadcastSub4DSlow(
+          sub_params, input1_shape, core::utils::castInputData<int8_t>(input1_data), input2_shape,
+          core::utils::castInputData<int8_t>(input2_data), output_shape,
+          core::utils::castOutputData<int8_t>(output_data));
+      }
+      else
+      {
+        status = pal::Sub(sub_params, input1_shape.flatSize(),
+                          core::utils::castInputData<int8_t>(input1_data),
+                          core::utils::castInputData<int8_t>(input2_data),
+                          core::utils::castOutputData<int8_t>(output_data));
+      }
+    }
+    break;
+#endif // DIF_QUANT
     default:
     {
       status = UnsupportedType;
diff --git a/onert-micro/onert-micro/src/execute/kernels/tests/Sub.test.cpp b/onert-micro/onert-micro/src/execute/kernels/tests/Sub.test.cpp
index 91d9da48a75..56b361d7f30 100644
--- a/onert-micro/onert-micro/src/execute/kernels/tests/Sub.test.cpp
+++ b/onert-micro/onert-micro/src/execute/kernels/tests/Sub.test.cpp
@@ -18,6 +18,7 @@
 #include "test_models/sub/FloatSubKernel.h"
 #include "test_models/sub/NegSubKernel.h"
 #include "test_models/sub/IntSubKernel.h"
+#include "test_models/sub/S8SubKernel.h"
 
 namespace onert_micro
 {
@@ -53,6 +54,18 @@ TEST_F(SubTest, INT_P)
   }
 }
 
+TEST_F(SubTest, S8_P)
+{
+  // No broadcast
+  {
+    const bool is_with_broadcast = false;
+    test_model::TestDataS8Sub test_data_add_no_broadcasting(is_with_broadcast);
+    std::vector<int8_t> output_data_vector =
+      onert_micro::execute::testing::checkKernel<int8_t>(2, &test_data_add_no_broadcasting);
+    EXPECT_THAT(output_data_vector, test_data_add_no_broadcasting.get_output_data_by_index(0));
+  }
+}
+
 TEST_F(SubTest, Float_P)
 {
   // No broadcast