Abstract: A pipe joint provided with a joint main body having a male screw portion and a cap nut screwed on the male screw portion of the joint main body. And, the pipe joint has an outer-fitting cylinder portion and an insertion cylinder portion holding an end portion of an elastically deformable connected pipe on inner and outer sides. And, a C-shaped stop ring, having a slit on its periphery and disposed within a tapered portion of a hole portion of the cap nut, is provided. The stop ring has a holding female portion formed through an inner peripheral face and a peripheral face of the stop ring. A rotator, held within the holding female portion as to rotate, touching the tapered portion of the hole portion of the cap nut, elastically forming a peripheral concave groove on a peripheral face of the pipe, and deforming the end portion of the pipe into a tapered portion increasing in diameter, is provided.

Abstract: A pipe joint provided with a joint main body having a tapered female screw portion on an opening end, and a cylindrical retainer having a male screw portion screwed into the female screw portion and plural small-disc continuous bodies each of which is composed of two or three small discs for pipe fixation embedded in the male screw portion along with the thread as a part of the small disc protrudes from a peripheral side and another part of the small disc protrudes from an inner peripheral face.