Power window system

A power window system of a motor vehicle for moving a window glass in opening and closing directions in response to operation of an opening and closing instruction switch to automatically move the window glass upward or downward, the system comprising:

• a measurement device for obtaining an open degree of the window glass, and
• a control device for controlling movement of the window glass in response to operation of the switch,
• wherein the control device moves the window glass in the closing direction when an open degree obtained by the measurement device is not less than a predetermined degree and in the opening direction when the open degree is less than the predetermined degree, and the predetermined degree corresponds to an intermediate position between a closed position and a fully open position with regard to the window glass.