Provided is a waterproof connector capable of reducing water-stopping warranty portions. A waterproof connector is configured to include an outer housing, an inner housing, a terminal-equipped with electrical wire, and a packing mat seal. In a bottom wall of the outer housing, a locking projection on the left side and a locking projection on the right side served as engagement part with respect to the inner housing are integrally formed. Further, in the bottom wall in the outer housing, the packing mat seal is integrally molded so as to adhere to circumferential surfaces of proximal end sides in the locking projection on the right side and the locking projection on the left side. An integral molding of the packing mat seal provides a watertight property between a packing mat seal and the circumferential surfaces of the proximal end sides in the locking projection and the locking projection.