To surely prevent corrosion of a metallic pipe part inside of a resin layer, by maintaining the anticorrosive effect over a long period.

In this anticorrosive method of a pipe connecting part, a resin-coated pipe 3 and a pipe connecting member 4 for covering an outer peripheral surface of a metallic pipe 1 with the resin layer 2, are connected by threadedly engaging the metallic pipe part 5 in a pipe end part of the resin-coated pipe with the pipe connecting member. A self-adhesive rubber tape 9 is wound over an outside surface of the resin layer and an outside surface of the pipe connecting member so as to mutually overlap while elastically extending, and an anticorrosive coated layer 10 continuing in series, is formed over an outer peripheral surface of the resin layer and an outer peripheral surface of the pipe connecting member.