Safety joint

A safety joint comprising a plug with a cylindrical shape in which a passage is formed, a socket in which a passage continuing to the passage in the plug is formed, and a shut off valve mounted on the passage in the socket, the shut off valve opening when the plug being inserted into the socket and closing when the plug being disconnected therefrom,

• wherein central axes of the passages of the plug and the socket form a straight line,
• a filling hose is connected to the plug, and
• a hose guide for limiting movement of the filling hose at a position separated from the plug;
• wherein one of the plug and the socket comprises a depressurizer including a main body portion made of metal, a depressurizing communication hole communicating with a fuel passage in the main body portion, a depressurizing plug made of metal, the depressurizing plug capable of being inserted into the depressurizing communication hole, and tapered portions formed on the depressurizing communication hole and the depressurizing plug respectively, the tapered portions having complemental shapes with each other.