To hold the long duration of service and to permit the increase of specified weight of a hanging object by enhancing the close contact strength of a simple hanger suction cup made of synthetic rubber and a resin material.

A coil spring 5 is built in this suction cup, and a knob 1 is pressed. Energy accumulated by the contraction of the coil spring 5 generates resiliency midway between a suction object face 6 and the knob 1. At this time, vacuum pressure is intensified inside a suction cup shade 3, and close contact strength is enhanced by the action of drawing the periphery of the suction cup. To prevent a separating phenomenon caused by tension applied to the tip of the suction cup by load pressure applied to the knob 1 when using the suction cup in a vertical direction, an elongation preventing groove is provided to cut off the influence of the tension.