A camera system has a rotary mirror type camera assembly including a camera, a mirror for camera arranged in front of the camera, and a mirror rotating mechanism driving the mirror for the camera, a rotary mirror type display apparatus including a monitor displaying an image picked up by the camera, a mirror for monitor arranged in front of the monitor, a finder permitting viewing of the image displayed on the monitor via the mirror for monitor, and a casing rotatable together with the mirror for monitor. The mirror for camera is rotated according to rotation of the casing and the mirror for monitor being fixed to the casing. When the casing is rotated, the mirror for monitor is rotated in display direction of the monitor in front of the monitor.