The present invention provides a negative pressure generator such as a suction cup and so on, with which the shape of the negative pressure transmitter remains constant when the negative pressure transmitter deforms so that no part thereof comes into contact with another member.The negative pressure transmitter 80 includes an opening 81, a closed bottom portion 83, and an intermediate portion 82 connecting the opening to the bottom portion, wherein the intermediate portion includes at least a plurality of rigid portions 84a that are formed at predetermined intervals so as to inhibit deformation, and flexible portions 86a that are formed between the plurality of rigid portions from a flexible material.
