A sheet S is stuck on the front surface of a wafer W, and the wafer W is supported on a table 20. A peeling tape T is stuck onto a peripheral portion of the sheet S and the peeling tape T is held by a peeling head 13. The peeling head 13 and the table 20 perform a relative movement along guide rails 25, the table 20 rotates a predetermined angle in clockwise and counterclockwise directions alternately via a swing mechanism 21 thereby peeling off the sheet S from the wafer W accompanying a zigzag movement.