To provide a crawler type wall surface suction travelling robot improved in reliability and travelling performance and reduced in costs.

This crawler type wall surface suction travelling robot 1000 comprises a control device 600 for operating a suction device 50 fitted to an intake hole of a crawler plate positioned on a lower side in relation to a frame on the basis of the crawler plate detected around a rotary shaft 201c of a sprocket 200c. A suction pad 403 can be provided with a rotatable crawler plate 401 to structure the crawler type wall surface suction travelling robot 1000 possible to turn.