To provide a three-dimensional spherical joint capable of reducing cost by omitting a flexible tube, by simultaneously obtaining axial telescopic motion and degree of freedom in the offset direction as well as degree of freedom in the bending direction.

A bolt 7a is loosely inserted into bolt through holes 22a and 22a punched in both flange sections 22 and 22, respectively, fastening is performed while second coil springs 8 are disposed between a nut 7b screwed with its tip screw part and the flange sections 22 to compress the second coil springs 8 and first coil springs 5, and repulsive force by compression of the first coil springs 5 presses and energizes each of seal rings 6 and 6 so as to abut on seal surfaces 23 and 23 with each predetermined force. Thus, the gaps between both end outer peripheral surfaces of a pair of telescopic slide pipe 3 and substantially conical seal surfaces 23 disposed at connection ends of both pipes 1 and 1 to be connected are sealed by the seal rings 6 and 6.