To speedily and easily mount a camera on a camera fixation member such as a tripod and a pan head without placing a load on operability, weight, and design since a small-sized camera, etc., is not only fixed on the pan head, the tripod, etc., but also frequently held in a hand for use.

On the camera fixation member, such as the tripod and the pan head, to which a camera is fitted from its lower surface with a screw, at least one or more light emitting means, at least two or more light receiving means, and an alarm means of generating sound, light, etc., are installed and the camera is provided with a reflecting plate, based upon the center of the screw hole on the lower surface of the camera, at positions coincident with the light emitting means and light receiving means arranged based upon the center of the screw of the camera fixation member; and the light emitted by the light emitting means is reflected by the reflecting plate and detected by the light receiving means and then the alarm means is placed in operation.