To allow connection for different kinds of resin pipes, and to allow connection by an EF joint and butt welding connection in its one end.

This connecting joint is provided with a joint body 22 formed of a thermoplastic resin, and a resin sleeve 28 formed of another kind of resin different from the thermoplastic resin is provided in an inner circumferential face in one end part of the joint body 22. The first resin pipe 30 is connected in the resin sleeve 28 in one end of the joint body 22 using an adhesive, the second resin pipe 32 is connected in the other end of the joint body 22 using thermal fusion, and the resin pipes 30, 32 comprising different kinds of resins each other are connected via the connecting joint.