To provide a rotary joint capable of maintaining a long service life and smooth rotation.

Between a rotating shaft 3 and fixed flanges 1, 2, a movable pipe formed with a groove for inserting a seal 12 into an outer periphery and an inner periphery and a peripheral groove 16 having a fluid passage into an outer periphery and an inner periphery is stored, so as to move vertically, by a drive mechanism formed out of a groove displaced in the vertical direction and a driving shaft engaging with the groove.