To transmit portrait image directed in a direction of a camera.

A computer 22 calculates the moving information of a camera 26 to a new position, based on coordinate data of an active window (e.g. image display window 38) and position information of the camera 26 and gives it to a motor control circuit 32. The motor control circuit 32 drives a motor 28, based on the moving information from the computer 22. A rotation of the motor 28 delivers via a cable 30 makes the camera 26 to move. Thus, the camera 26 is moved to a designated position, that is, in the vicinity of the active image display window 38. In the case that a data display window 40 is active, the computer 22 moves the camera 26 which is closest to the window 40.