diff --git a/onnxruntime/python/onnxruntime_pybind_state.cc b/onnxruntime/python/onnxruntime_pybind_state.cc
index 5ac9c149bbe80..ce7259172da30 100644
--- a/onnxruntime/python/onnxruntime_pybind_state.cc
+++ b/onnxruntime/python/onnxruntime_pybind_state.cc
@@ -1688,6 +1688,13 @@ Serialized model format will default to ONNX unless:
 - there is no 'session.save_model_format' config entry and optimized_model_filepath ends in '.ort' (case insensitive)
 
 )pbdoc")
+      .def_property(
+          "enable_cpu_mem_arena",
+          [](const PySessionOptions* options) -> bool { return options->value.enable_cpu_mem_arena; },
+          [](PySessionOptions* options, bool enable_cpu_mem_arena) -> void {
+            options->value.enable_cpu_mem_arena = enable_cpu_mem_arena;
+          },
+          R"pbdoc(Enable memory arena on CPU. Default is true.)pbdoc")
       .def_property(
           "enable_mem_pattern",
           [](const PySessionOptions* options) -> bool { return options->value.enable_mem_pattern; },