The present invention provides a substrate treating apparatus, including: a housing including a first body and a second body which are combined with each other to provide a treatment space in which a substrate is treated; an actuator which moves the second body in a vertical direction with respect to the first body to seal or open the treatment space; and a pipe which is coupled with the second body and in which a fluid flows, in which the pipe is a stretchable pipe that is stretchable and contractible according to the vertical movement of the second body.