Pipe jointing unit

The present invention generally relates to a jointing unit. More particularly, the present invention pertains to a pipe jointing unit for jointing a variety of pipes in a vehicle and the like. A pipe jointing unit includes a cylindrical joint in which is accommodated a pipe, a ring-shaped seal member positioned in the joint, an elastic connecting member positioned in the joint and holding the pipe and the ring-shaped seal member in the joint, and a guide member detachably connected to the joint. The guide has an annular guide portion which is disposed circumferentially between the inner surface of the edge portion of the joint and the outer surface of the pipe. The pipe is thus restricted from swinging in the radial direction relatively against the joint and the reliability of the resistance force against pulling the pipe out of the connecting member by vehicle vibration, an increase of the internal pressure of the pipe and the like is improved.