To enable easy installation, removal or reuse without additional fastening with dedicated additional fastening equipment by only threading, in a pipe joint attached to a high pressure hose for a machine tool, a civil engineering machine, an oil/pneumatic tool, etc.

The pipe joint is provided with male screws 1a, 1b screwed to a fastening fitting 4 on a pipe joint body 1, and a core fitting 2 following thereto. A collet 3, which makes an external surface an inclined slope 3a, is inserted into the core fitting 2 to make a front of the fastening fitting 4 a female screw 4a screwed to the male screws 1a, 1b of the pipe joint body 1, and the inner surface of the rear an inclined surface 4b corresponding to the inclined surface 3a of the collet 3.