Abstract: A bivalve peeling-off method and apparatus and a before-separation heating device are disclosed. The bivalve peeling-off apparatus includes a heating means 6 for heating the surface of one of shells 2A of a starting bivalve 2, so that an edible part 2a in the starting bivalve 2 is maintained in a raw state. Thus, the edible part can be efficiently separated from the shell of the starting bivalve in a state in which a quality suitable for use in raw eating is maintained.