A computer mouse capable of restraining rebound force includes a main body, a circuit board, a switch module, a button and an elastic element. The circuit board and the switch module are assembled in a receiving space of the main body. The button is movably disposed on a top board of the main body in an up-and-down manner. The elastic element is disposed between the top board and the button and close to a free end of the button. The elastic element has a first end which is abutted against the top board of main body and a second end which is abutted against an inner side of the button. Thus, the elastic element can restrain the rebound force when the button is pressed, and the button can be clicked exactly without generating a double-click event.