diff --git a/src/base/tanh_backward_grad_input.h b/src/base/tanh_backward_grad_input.h
new file mode 100644
index 00000000..6c85ea23
--- /dev/null
+++ b/src/base/tanh_backward_grad_input.h
@@ -0,0 +1,50 @@
+#ifndef INFINI_OPS_BASE_TANH_BACKWARD_GRAD_INPUT_H_
+#define INFINI_OPS_BASE_TANH_BACKWARD_GRAD_INPUT_H_
+
+#include "operator.h"
+
+namespace infini::ops {
+
+class TanhBackwardGradInput : public Operator<TanhBackwardGradInput> {
+ public:
+  TanhBackwardGradInput(const Tensor grad_output, const Tensor output,
+                        Tensor grad_input)
+      : grad_output_shape_{grad_output.shape()},
+        grad_output_strides_{grad_output.strides()},
+        grad_output_type_{grad_output.dtype()},
+        output_shape_{output.shape()},
+        output_strides_{output.strides()},
+        output_type_{output.dtype()},
+        grad_input_shape_{grad_input.shape()},
+        grad_input_strides_{grad_input.strides()},
+        grad_input_type_{grad_input.dtype()},
+        device_index_{grad_input.device().index()} {}
+
+  virtual void operator()(const Tensor grad_output, const Tensor output,
+                          Tensor grad_input) const = 0;
+
+ protected:
+  Tensor::Shape grad_output_shape_;
+
+  Tensor::Strides grad_output_strides_;
+
+  DataType grad_output_type_;
+
+  Tensor::Shape output_shape_;
+
+  Tensor::Strides output_strides_;
+
+  DataType output_type_;
+
+  Tensor::Shape grad_input_shape_;
+
+  Tensor::Strides grad_input_strides_;
+
+  DataType grad_input_type_;
+
+  int device_index_{0};
+};
+
+}  // namespace infini::ops
+
+#endif