To provide a sanitary pipe joint making two pipe units quickly connectable, simplifying a constitution, to be profitable also in the point of a cost, having also a function capable of releasing and interrupting a fluid.

In this pipe joint, having a main unit member 3 mounting a first pipe unit 7 in one end, a connection member 1 mounting a second pipe unit 6 in one end to be coaxially provided to the main unit member 3, and a separation operating member 2 removing/mounting the connection member 1 relating to the main unit member 3, an annular recessed part 35 is formed in an external peripheral surface of the main unit member 3, an inner side lock piece 151 provided with a hook part 152 formed so as to engage with the annular recessed part 35 is provided in the connection member 1, the separation operating member 2 is constituted by an outer side annular unit 22 and an inner side annular unit 21 formed so as to be positioned in an upper part of the hook part, also a press part 25 displacing the hook part 152 in a radial direction is provided in the inner side annular unit 21, the annular recessed part 35 and the hook part 152 are disengaged by axially displacing the separation operating member 2, so that the separation operating member 2 and the connection member 1 can be removed from the main unit member 3.