To provide a tank joint 10 having improved sealing performance and impact resistance, a reduced size, and improved inserting workability.

The tank joint 10 including a joint body 11, a nipple 20 and a gasket 30 connects the internal of a fuel tank FT to the external via a pipe P. The nipple 20 into which the pipe P is pressed is inserted into a mounting hole 11S of the joint body 11. Additionally, it is blocked at its insertion clearance by the gasket 30. The gasket 30 thrusts the outer wall of the nipple 20 and the inner wall of the joint body 11, and is fixed with its engaged portion 32a as part of a fixing mechanism being engaged with an engaging portion 12b of the joint body 11.