Socket fluid transfer coupling device

By linking together the socket (10) and the plug (70), the socket of and the flow paths fluid transfer coupling device for communicating with each other the plug (5) is a socket for plugged the plug outlet (19) provided in the vicinity of the mount panel mounting portion for mounting the mounting panel socket (18) and (17), the insertion opening provided in different positions the support portion for supporting the socket (35 ) and a. Accordingly, the socket even when the flow rate of the fluid is large can be stably supported on the mounting panel. Preferably, at least a portion of the socket is constituted by a spigot format.