A suction cup is disclosed, including a suction disc assembly, a rotatable unit and a hanger accessory interface; wherein the suction disc assembly including a suction disc and a pull-up element disposed on the suction disc; the rotatable unit including a carrier base, a penetration hole, and a plurality of tilt tracks, the tilt tracks being distributed around a ring-shaped inner wall of the carrier base and the penetration hole being formed at the center area of the carrier base; the hanger accessory interface being disposed inside the carrier base and contacts the suction disc through the carrier base; the hanger accessory interface including a plurality of slider blocks, with each slider block located at a corresponding tilt track; the pull-up element being engaged to the hanger accessory interface through the penetration hole; as such, suction cup provides convenience and enhance durable suction for attachment.