The invention discloses a sliding-type sucker comprising a sliding disk and an elastic rubber cup which are in seal fit; the surface of the sliding disk is smooth and a surface which fits with an adsorption plane is concave inwards to form a recess; the recess is provided with an air suction hole therein which is communicated with the elastic rubber cup; one end of the elastic rubber cup is connected with the sliding disk and the other end is connected with a vacuum generator. The sliding-type sucker of the invention can directly slide on an adsorption plane with good adsorption performance and can smoothly pass through unevenness places on the adsorption plane.