PURPOSE: To obtain a wall surface walking device which is hardly restricted in an operation range and has the excellent transmission efficiency of the negative pressure generated in a negative pressure generation part.

CONSTITUTION: An sucking part 1 which generates a suction force by successively supplying each negative pressure to a plurality of suckers 4 and a diaphragm vacuum pump 8 for supplying a negative pressure to the suction part 1 are constituted integrally. In concrete, the diaphragm vacuum pump 8 is joined with a motor 14 through a rod 11 and an eccentric crankshaft 10, and the suction side of the diaphragm vacuum pump 8 is joined with a manifold chamber 3, which is joined with a plurality of suckers 4 through an always closed type valve body 5, and a cam 7 for successively opening and closing the valve body 5 is installed in the manifold chamber 3, and a motor 14 is joined as the driving source for the cam 7.