CLAMP BODY, AND CLAMPING DEVICE

PROBLEM TO BE SOLVED: To provide a clamping device which has no T-shaped groove, and can be adapted to any fitting parts of dies of different thickness. SOLUTION: A clamping device is provided with a locking body 2 having a swollen part 27 on a tip of a rod-shaped part 26 projected from a fitting surface 25 of a die 45 on a press side, a locking body insertion hole 3 capable of inserting the swollen part which is pierced in a flange-shaped fitting part 28 on the side of a die to be fitted to the fitting surface corresponding to the position of the locking body, a clamp body 1 which is provided with a recessed part 14 which is of plate-shape, recessed with the width corresponding to the thickness of the rod-shaped part from a part of the outer edge, and reaches the center part, interposes the recessed part between the fitting part of the die arranged at the fitting position and the swollen part passed out of the insertion hole so that the rod-shaped part is passed through, and pressing the fitting part against the fitting surface to the swollen part by increasing the dimension in the thickness direction by feeding the hydraulic pressure. A spherical seat structure part in which two members are abutted on each other through a projecting spherical surface and a recessed spherical surface is provided between the clamp body and the swollen part. The spherical seat structure part is assembled with the swollen part of the locking body, or assembled in the clamp body so that one surface of the clamp body is changeable in angle relative to the other surface.