A fluid loading joint for rotatably connecting double pipes to each other includes: a first half including a first inner pipe, a first outer pipe, and a holder, the first inner pipe being provided with a first flange, the first outer pipe accommodating the first inner pipe therein, the holder holding the first outer pipe such that the first outer pipe is rotatable; a second half including a sliding surface facing the first flange, the second half including a second inner pipe and a second outer pipe, the second inner pipe being provided with a second flange, the second outer pipe accommodating the second inner pipe therein and being provided with an outer flange that is fastened to the holder; an inner sealing member and an outer sealing member that are disposed between the first flange and the sliding surface; an inner passage provided in the second flange, the inner passage leading a leaked fluid from between the inner sealing member and the outer sealing member to an outer circumferential surface of the second flange; an outer passage provided in the outer flange, the outer passage leading the leaked fluid from an inner side to an outer side of the second outer pipe; and a leakage pipe that connects the inner passage and the outer passage between the second flange and the outer flange.