A waterproof connector housing (1) includes a housing main body (2), a hood portion (4) for engaging with a mating housing via a shoulder portion (3) provided on the housing main body, an elastic seal ring (5) for maintaining water-tightness with the mating housing inside the hood portion, and a holding portion (5a) for the elastic seal ring extending from the body of the seal ring to the end surface of the housing main body. With this waterproof connector housing, the elastic seal ring can be easily molded, and the amount of wasted raw material can be dramatically reduced. Also, the hood portion can take various forms and be made smaller.