To provide a movable carriage adsorbing to a surface with an adsorbing means such as negative pressure, capable of easy side shifting to the direction of crossing the traveling direction or lateral moving.

Driving and moving means composed of at least two units of driving wheels or one endless track is provided on each of the right and left sides toward the moving direction of the movable carriage. In a plurality of contact parts at the left or right side optionally selected toward the moving direction of the movable carriage out of the plurality of contact parts of the driving and moving means and a traveling surface, one optionally selected part is arranged in the vicinity of the center of adsorbing force acting on the movable carriage, and the other contact parts are arranged at positions away from the center of the adsorbing force. When the movable carriage turns around the one optionally selected contact part, the other contact parts slip sideways.