A clamping device for holding and raising a bone-in limb meat comprising: a base portion, and a pair of clamp pieces (14a, 14b) mounted to the base portion and configured to hold a bone-in limb meat; the clamping device further comprising an orientation adjusting member for adjusting an orientation of the bone-in limb meat, the orientation adjusting member being mounted to the base portion independently of the pair of clamp pieces (14a, 14b), the orientation adjusting member comprising an inclined surface inclined with respect to a center line between the pair of clamp pieces (14a, 14b), in a planar view in which the clamping device is viewed from a direction (b) perpendicular to the center line and perpendicular to an opening/closing direction (a) of the pair of clamp pieces (14a, 14b), wherein, when the pair of clamp pieces (14a, 14b) are in an opened state, at least a part of the inclined surface of the orientation adjusting member is disposed so as to overlap a space formed between the pair of clamp pieces (14a, 14b) in the planar view, wherein, in the planar view, an acute angle (θ) is formed between the inclined surface and a segment toward a tip side of a corresponding clamp piece (14a, 14b) from an intersection point between the center line and an extension line of the inclined surface, wherein tip portions of the pair of clamp pieces respectively have inner surfaces facing each other across the space, and when the pair of clamp pieces are in a closed state, the inner surfaces of the pair of clamp pieces incline with respect to the center line such that a distance between the inner surfaces decreases toward tip sides of the clamp pieces. a base portion, and a pair of clamp pieces (14a, 14b) mounted to the base portion and configured to hold a bone-in limb meat; the clamping device further comprising an orientation adjusting member for adjusting an orientation of the bone-in limb meat, the orientation adjusting member being mounted to the base portion independently of the pair of clamp pieces (14a, 14b), the orientation adjusting member comprising an inclined surface inclined with respect to a center line between the pair of clamp pieces (14a, 14b), in a planar view in which the clamping device is viewed from a direction (b) perpendicular to the center line and perpendicular to an opening/closing direction (a) of the pair of clamp pieces (14a, 14b), wherein, when the pair of clamp pieces (14a, 14b) are in an opened state, at least a part of the inclined surface of the orientation adjusting member is disposed so as to overlap a space formed between the pair of clamp pieces (14a, 14b) in the planar view, wherein, in the planar view, an acute angle (θ) is formed between the inclined surface and a segment toward a tip side of a corresponding clamp piece (14a, 14b) from an intersection point between the center line and an extension line of the inclined surface, wherein tip portions of the pair of clamp pieces respectively have inner surfaces facing each other across the space, and when the pair of clamp pieces are in a closed state, the inner surfaces of the pair of clamp pieces incline with respect to the center line such that a distance between the inner surfaces decreases toward tip sides of the clamp pieces.