Abstract: A suction cup is provided, including: a suction member, a first check valve and a second check valve. The suction member includes a seat body, a control member movably disposed on the seat body, a first flow channel and a second flow channel. The seat body includes a seat portion and a cup portion which is elastically deformable and disposed on the seat portion. The seat body has a first gas chamber, and a second gas chamber is defined between the control member and the seat body. The first flow channel is communicated with first gas chamber and the second gas chamber. The first check valve is disposed within the first flow channel and openably closes the first flow channel. The second check valve is disposed within the second flow channel, openably closes the second flow channel.