The invention comprises a method of thawing meat frozen in meat blocks (1) and comprising an apparatus for initial separation of the meat block (1) before the meat block (1) is placed in a rotating container (7), said meat block (1) being subjected to pressure before treated in the rotating container (7), said pressure initiating a separation process of the meat block (1) into individual pieces (2). This pressure may be applied over the diagonals of the meat block (1). The invention also comprises an apparatus for performing the method, said apparatus comprising a number of pistons (3, 4, 5, 6) which either cooperate in pairs or cooperate with a firm opposite face for applying pressure to the meat block (1). The faces of the pistons (3, 4, 5, 6) may be plane, or they may comprise elevations or depressions as well as adapted to act over at least one of the diagonals of the meat block (1).