Disclosed is a cleaning device having a cleaning head to which a cleaning sheet is to be attached. The cleaning head has a pad whose bottom face functions as a cleaning part. The cleaning part has a recess, side contact parts on both sides of the recess and a rear contact part behind the recess. When a front portion of the cleaning head is pressed against a floor surface by a pushing force acting on the shaft, the recess prevents excessive frictional resistance. In addition, the cleaning sheet can be efficiently exploited because dirt can be collected also in the center of the cleaning part.