While a transporting unit transports an adhesive sheet attached to a separator larger than the adhesive sheet, a chuck member on a tip of a swing arm of a separating unit holds a portion of the separator protruding from an end of the adhesive sheet. Under such a condition, the chuck member moves in a direction crossing a transportation direction of the adhesive sheet, and the transporting unit moves in the transportation direction in synchronization with the chuck member while folding back the separator at an end of a supporting plate contacting the separator as a starting point. Accordingly, the separator is separated from the adhesive sheet. The transporting unit transports while holding the adhesive sheet with the separator separated therefrom to join the adhesive sheet to a workpiece.