PURPOSE: To facilitate maintenance and inspection as well as to easily and reliably perform attachment/detachment of a fluid joint.

CONSTITUTION: In a fluid joint 10 wherein a contact surface 24 of a supplying pipe body 20 and a contact surface 34 of a receiving pipe body 30 are brought in contact with each other, and a discharging port 21 formed by reducing the diameter of the supplying pipe body 20 are communicated with a receiving port 31 of the receiving pipe body 30, a suction part G communicated with the discharging port 21 and the receiving port 31 is provided between the contact surfaces 24, 34 of both pipe bodies 20, 30.