The present invention is to provide a waterproof connector with a gluing plane coated by waterproof glue, which includes an isolation base having a gluing plane formed at a rear end thereof, a plurality of first and second connection terminals each having a rear end exposed out of the gluing plane and an isolation sheet positioned between the first and second connection terminals; a metal casing for allowing the gluing plane to be positioned therein near a back opening thereof while the isolation base is inserted into the metal casing via the back opening; and a waterproof glue layer formed by coating a waterproof glue along where the gluing plane and an inner surface of the metal casing are abutted with each other. Thus, when the waterproof glue is hardened to form the waterproof glue layer, cracks between the metal casing and the isolation base are fully and watertightly filled.