To provide a suction cup for a wall surface capable of attaching heavier apparatus to a vertical wall surface by solving a problem in a suction cup wherein normally, suction force becomes larger as an area of a cup-like suction part becomes larger since suction is carried out by atmospheric pressure applied to the cup-like suction part, but when attaching an apparatus by the suction cup to a vertical wall surface, weight of the apparatus attached to a protrusion part of the suction cup is mainly supported by the cup-like suction part in an upper side than the protrusion part, the cup-like suction part in a lower side than the protrusion part does not contribute much, and only comparatively lightweight things can be attached.

The suction cup for a wall surface is characterized by that the protrusion part is provided in a part near an end from a center of a protruding face side of the cup-like suction part.