A shoulder blade removal device of bone-in meat includes: a bottom holder which is configured to be in contact with a lower side of the bone-in meat such that the lower side of the bone-in meat is lifted upward and moved in a horizontal direction; a support member for bending the bone-in meat in cooperation with the bottom holder such that an end of the shoulder blade; and a chuck unit attached to a robot arm and gripping the tip part of the shoulder blade in cooperation with the robot arm. The chuck unit includes: a base member fixed to the robot arm; a grip member; and a lock member supported by the base member such that the lock member can be advanced or retracted toward or away from the lateral plate part, the lock member pinching the shoulder blade in cooperation with the lateral plate part.