To provide a joint for interconnecting piping materials made of different kinds of metals to hold a joint body in such a state to completely protect it from the outside and have excellent durability of a joint body.

A joint for interconnecting piping materials made of a different kinds of metals comprises the outer wall surface of a joint body 1; and a resin- covered layer 7 with which the part exposed to the outside of the joint body of a cylinder body fixing member 4 is surrounded. The exposure part of the cylinder body fixing member 4 and the resin-covered layer 7 are fused for integral formation, and a cylindrical part 71 having a gap, being a filling space for a filler, formed between the cylindrical part and the outer peripheral surface of an inner surface resin lining pipe 5 being one piping material to be connected is extended from the resin-covered layer 7.