An evaporated fuel treating module 20 is an integration of a canister 5, a pressure sensor 6, a canister vent solenoid valve 7, an air filter 8 and a one way-valve 9 into a unit without connecting pipes. Further, in the evaporated fuel treating module 20, also a two-way valve 10 and a bypass solenoid valve 12 may be integrated into the unit.