To compactify a device, to reduce a physical burden to a worker for calibration, and to apply a great load to a very small area.

This pressure device for calibration of a pressure sensor sheet is provided with: a base; a patch 4 mounted on the base; a fluid pressure (hydraulic)cylinder 2 arranged in an upper side of the base; and a pressor 3 provided in an output shaft 20 end of the cylinder 2, and the cylinder 2 is brought into a driving condition to press the pressor 3 onto the pressure sensor sheet S mounted on the patch 4. The device is also provided with a frame 1 of a U-shape in its side view having rigidity; the cylinder 2 is provided vertically in an upper part of the frame 1; and the patch 4 is provided in a lower part of the frame 1.