To provide the setting structure of the joint that can be attached to other setting object and the inside and outside of connection part are sealed without restricting the revolving angle in the setting condition of the joint.

The joint body 10 that a male screw part is formed at the prescribed position of an end part, the seal packing 23 that is fitted to this end part and the nut 21 that engages to a male screw part of the joint body and compresses the seal packing are furnished. It is the setting structure of the joint while sealing the joint body with an object by tightening the nut, which consists of the first male screw part 11 that the male screw part of the joint body is engaged with the female screw of the setting object and the second male screw part 12 that engages with a nut. The contact range 13 with the seal packing when compressing the seal packing is formed between the first male screw part and the second male screw part, and the seal packing contacts the setting object in the nut tightening condition.