Provided is a substrate treating apparatus including a housing; a plurality of opening-and-closing members configured to provide a driving force for opening and closing the housing; a fluid storing member supplying a fluid to the opening-and-closing members; and a fluid distribution unit connected to the fluid storing member via a supply conduit to distribute the fluid supplied from the fluid storing member to the opening-and-closing members. The fluid distribution unit includes a distribution conduit diverging from the supply conduit and connected to a corresponding one of the opening-and-closing members; and a fluid distribution member provided at a junction between the supply conduit and the distribution conduit.