This pipe joint (1) consisting of a resin is provided with: a joint body (3) having an inner flow passage (2) through which fluid flows; and a weld end section (4) formed at an opening portion of the joint body (3). One or more positioning sections (5), each adapted to fit in a positioning engagement section (54) provided in a surface (53a, 52a) of the gripping and holding section (52, 53) of a clamp jig (51) and/or a surface (53a, 52a) of the gripping and holding section (52, 53) of the clamp jig (51), the surfaces (53a, 52a) facing each other, are formed on the outer peripheral surface of the joint body (3) at positions offset from the center axis (CL) of the inner flow passage (2) of the joint body (3).