An exemplary computer mouse includes a main body and a remote control. The main body includes a receiving cavity for receiving the remote control. The receiving cavity has two opposite sidewalls. Each of the two opposite sidewalls defines a first recess, a second recess, and a third recess. The first recess is located between the second recess and the third recess and is separated from the second recess and the third recess. The remote control includes a first sidewall and a second sidewall. Each of the first and second sidewalls of the remote control includes a first protruding post and a second protruding post. Each of the first protruding posts is latched in the corresponding second recess or the corresponding third recess to fix the remote control in the receiving cavity. Each of the second protruding posts slides in the corresponding first recess to make the remote control rotatable.