COUPLING DEVICE FOR WORKING MACHINE

PROBLEM TO BE SOLVED: To improve reliability of connection between power connectors in a coupling device for a working machine allowing a power connector on a coupling frame side and a power connector on the working machine side to be automatically connected when automatically connecting the working machine to the coupling frame liftably mounted at a rear part of a tractor vehicle body.SOLUTION: In the coupling device for a working machine, a power connector 41 in one side of the coupling frame 3 side or the working machine 4 side is supported so as to recede from a connection position to the other power connector 42, and an interlocking mechanism 98 is provided for making the one power connector 41 recede from the connection position by interlocking with the operation of the working machine 4 to move closer to the coupling frame 3, and making the one connector 41 advance to the connection position to connect with the other connector 42 when the working machine 4 is coupled to the coupling frame 3.