A resin pipe joint is provided so that a general worker can easily connect a resin pipe material without using a special tool. The resin pipe joint unit includes synthetic resin joint bodies, a synthetic resin pipe unit, and junk rings. The synthetic resin joint bodies have tubular sockets at one end portion thereof. The synthetic resin pipe unit has predetermined diameter and length, and inner ring portions are integrally formed in at least one end of a pipe portion in the synthetic resin pipe unit. The junk rings are screwed on the sockets of the joint bodies. In the resin pipe joint unit, the pipe unit is connected to the joint bodies by pressing end faces of the inner ring portions toward the side of the joint bodies respectively, when the junk rings are screwed on the sockets of the joint bodies.