In a waterproof connector M in which a waterproof seal member 60 is held between a connector housing 30 and a rear holder 70, and an electric wire seal portion closely attached to an outer periphery of an electric wire so as to seal between the electric wire and the connector housing 30 and a connector seal portion 60B for sealing between both of the connector housings at a time of fitting to an opposing connector housing are integrally formed in the waterproof seal member 60, wherein the connector seal portion 60B is provided on an outer peripheral surface of the rear holder 70 in an exposed manner so as to be closely attached to an inner periphery of a hood portion of the opposing connector housing at a time of fitting the connector housing 30 to the opposing connector housing.