Abstract: A camera built-in rearview mirror is presented which includes an opening made on an under portion of a mirror housing, a camera built in the mirror housing having a lens facing the opening, and a transparent cover for closing the opening that the lens of the camera faces. It has a feature that the camera is mounted in the mirror housing attachably thereto or detachably therefrom. In this way, the rearview mirror allows the easier assembling and disassembling of the camera in the mirror housing and positioning of the camera with the opening. It can protect against dirt sticking to the lens and the occurrence of wind noise securely. Also when the mirror housing suffers from damages, the rearview mirror allows reuse of the camera, thereby contributing to a cost reduction in mirror housing replacement.