A waterproof electrical receptacle connector includes a plastic shell, a metallic shell, an insulated housing, and a sealing member (e.g., a waterproof glue block). The plastic shell has a through hole and includes an inserting end and a sealed end respectively at two sides of the through hole. The metallic shell is disposed in the through hole and the metallic shell defines a receiving cavity. The insulated housing is disposed in the receiving cavity. A plurality of receptacle terminals is assembled to the insulated housing. The sealing member is filled in the sealed end to fill a gap between the metallic shell and the plastic shell, and the sealing member is also filled in the bottom of the base portion where the receptacle terminals are exposed for improving the waterproof function of the connector.