PURPOSE: To provide a wall surface running robot with which a good attachment to the wall is obtained, by furnishing two pairs of drive wheels and follower wheels at the two ends of a frame, arranging fundamentally a plurality of moving suction cups on a belt wound on the wheels, and always giving a tension to the belt even when the drive wheels rotate in any direction, i.e., regularly and reversely.

CONSTITUTION: A wall surface running robot 1 is fitted with a drive wheel 3 and follower wheel 4 in such a way as confronting at a cerrain spacing across the width at one end of a frame 2, and also another drive wheel 3 and follower wheel 4 are furnished in such a way as confronting with the positioning inverted on the other side end. A belt 5 is set on each pair of wheels 3, 4. A plurality of moving suction cups 6 are secured to the peripheral surface of this belt 5 and are connected with a vacuum generation device through a suction pipe 7. On the way of this suction pipe 7, a control part is installed which is connected with the vacuum generation device when suction cup 6 is sucked and disconnected when separated.