Abstract: This tenderizing device especially for butchery meat, comprising a stand (2) equipped with a base (3) for receiving the meat and with a blade carrier assembly (4) guided in displacement in the stand towards the base under the control of actuating means (5), is characterized in that the said blade carrier assembly (4) takes the form of a U-shaped block, the lower part (9) of which comprises two parallel and spaced supporting branches (10, 11), on which rest projecting parts (12a, 12b) provided in the upper part of the blades (12), and in that there are removable means (13, 14) for blocking the blades, interacting with the upper surface of the blades (12) and the lateral branches of the U-shaped block, in order to block the blades in position.