To provide a plate separator and a separation method capable of separating the uppermost metallic plate from a stack, and a plate takeout device having the plate separator.

The plate separator 3 is provided for at least partially separating the uppermost metallic plate 1a out of a plurality of laminated metallic plates 1 from a metallic plate 1 positioned immediately under the metallic plate, and has a heating system 5 for generating a warp in a heating part of the metallic plate 1a by relatively thermally expanding the upper surface of the metallic plate 1a to the under surface of the metallic plate 1a by intensively heating the vicinity of the upper surface of the uppermost metallic plate 1a.