To reduce material cost, improve workability, and reduce the occurrence of safety accidents, the front jig part that forms the front support groove so that the overlay welding test piece is movably supported back and forth, and is installed facing each other at regular intervals with the front jig part A first connection in which a rear jig portion forming a rear support groove is formed such that the overlay welding test piece is supported so as to be movable back and forth, and one side of the front jig portion is connected and fixed to the front end, and one side of the rear jig portion is connected to the rear end to be fixed The frame and the second connecting frame to which the other end of the front jig is connected and fixed to the front end, and to which the other end of the rear jig is connected to and fixed to the rear end, and the front end of the overlay welding test piece are inside the front support groove. It provides a jig for an overlay welding test piece comprising a front fixing member fixed to the rear end member for fixing the rear end of the overlay welding test piece to the inside of the rear support groove.
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