A safety joint including: a cylindrical nozzle side member with a flow path formed inside; a shutoff valve of the nozzle side member configured to open when the nozzle side member is connected to a filling apparatus side member; and the filling apparatus side member with a cylindrical shape and a flow path formed inside, wherein the filling apparatus side member can be connected to the nozzle side member, wherein the shutoff valve of the nozzle side member is configured to close and the flow path of the filling apparatus side member is configured to close, when the nozzle side member is disconnected from the filling apparatus side member, wherein: central axes of the flow paths (R10, R20) of the nozzle side member and the filling apparatus side member are arranged orthogonally; the nozzle side member has a protruding portion with a diameter smaller than a region in which a valve body is housed, and the protruding portion is formed with a through hole that communicates the flow path (R10, 14, 15) of the nozzle side member and the flow path (R20, 222, 223) of the filling apparatus side member; the filling apparatus side member has an opening portion into which the protruding portion of the nozzle side member is inserted, the opening portion extending in a direction orthogonal to the flow path of the filling apparatus side member; the opening portion is provided with a slidable closing member and an elastic member for urging the closing member in a direction that the nozzle side member comes off; and said safety joint further includes a closing member holding mechanism that holds the closing member at a position separated from the nozzle side member when the nozzle side member and the filling apparatus side member are connected, wherein the closing member is configured to block the flow path of the filling apparatus side member to be closed when the nozzle side member is pulled out from the filling apparatus side member. the filling apparatus side member with a cylindrical shape and a flow path formed inside, wherein the filling apparatus side member can be connected to the nozzle side member, wherein the shutoff valve of the nozzle side member is configured to close and the flow path of the filling apparatus side member is configured to close, when the nozzle side member is disconnected from the filling apparatus side member, wherein: central axes of the flow paths (R10, R20) of the nozzle side member and the filling apparatus side member are arranged orthogonally; the nozzle side member has a protruding portion with a diameter smaller than a region in which a valve body is housed, and the protruding portion is formed with a through hole that communicates the flow path (R10, 14, 15) of the nozzle side member and the flow path (R20, 222, 223) of the filling apparatus side member; the filling apparatus side member has an opening portion into which the protruding portion of the nozzle side member is inserted, the opening portion extending in a direction orthogonal to the flow path of the filling apparatus side member; the opening portion is provided with a slidable closing member and an elastic member for urging the closing member in a direction that the nozzle side member comes off; and said safety joint further includes a closing member holding mechanism that holds the closing member at a position separated from the nozzle side member when the nozzle side member and the filling apparatus side member are connected, wherein the closing member is configured to block the flow path of the filling apparatus side member to be closed when the nozzle side member is pulled out from the filling apparatus side member. central axes of the flow paths (R10, R20) of the nozzle side member and the filling apparatus side member are arranged orthogonally; the nozzle side member has a protruding portion with a diameter smaller than a region in which a valve body is housed, and the protruding portion is formed with a through hole that communicates the flow path (R10, 14, 15) of the nozzle side member and the flow path (R20, 222, 223) of the filling apparatus side member; the filling apparatus side member has an opening portion into which the protruding portion of the nozzle side member is inserted, the opening portion extending in a direction orthogonal to the flow path of the filling apparatus side member; the opening portion is provided with a slidable closing member and an elastic member for urging the closing member in a direction that the nozzle side member comes off; and said safety joint further includes a closing member holding mechanism that holds the closing member at a position separated from the nozzle side member when the nozzle side member and the filling apparatus side member are connected, wherein the closing member is configured to block the flow path of the filling apparatus side member to be closed when the nozzle side member is pulled out from the filling apparatus side member.