PURPOSE: To improve visibility and operability while running in the rain by changing an intermittent stopping time of a wiper operation at an automatic mode by a photo detection element in accordance with the brightness of the environment while running in the rain, etc. or in conjunction with a lighting switch.

CONSTITUTION: When switches 23, 24 are closed, a transistor TR 16 conducts, activating a relay coil 14, then a contact 15 is closed and a motor 17 is operated to start an intermittent operation of a wiper blade. At this time, if a lighting switch 1 is placed at a tail position 2 or head lighting position 3, relay coils 4, 6 are absorbed respectively, relay contacts 5, 7 are closed and individual lamps 8, 9 are lighted. At the same time, a TR 10 conducts in parallel with a resistor 12, thereby the intermittent stopping time determined by resistors 11, 12 and a condenser 13 is made shorter. When the outside brightness is reduced, the resistance of a photo detection element 18 becomes larger, then comparators 19, 20 are reversed and TR 21, 22 conduct respectively and the intermittent stopping time becomes shorter.