To provide a device that can measure an ultimate value of a dry shrinkage distortion of a cementum hardening body at an early stage and with high accuracy, and to provide a method and the like that measure the dry shrinkage distortion of the cementum hardening body using the device.SOLUTION: A dry shrinkage distortion measurement device of the present invention is the measurement device that includes at least: (A) one or more laser displacement meters; (B) a pedestal for loading a dry shrinkage distortion measurement-purpose test piece in place; and (C) a positioning jig for the test piece, and is for the purpose of measuring a dry shrinkage distortion. Further, a dry shrinkage distortion measurement method of the present invention is the method for:, after loading the disc-like or a square plate-like test piece in place on the pedestal of the dry shrinkage distortion measurement device so that a lateral surface around the test piece contacts with a positioning jig, using the laser displacement meter to irradiate the lateral surface around the test piece with a laser; measuring a distance between the laser displacement meter and the lateral surface around the test piece; and thereby measuring a dry shrinkage distortion of the test piece.SELECTED DRAWING: Figure 1
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