PURPOSE: A tester for testing dynamic properties of materials is provided to improve reliability of the tester by minimizing a measuring error. CONSTITUTION: A tester includes a shaker(21). A supporting plate(22) is coupled to a vibration shaft(21a) of the shaker(21). A base plate(24) is installed spaced from the supporting plate(22). A first acceleration sensor(25) is coupled to the base plate(24) in a concentric position with respect to the vibration shaft(21a) of the shaker(21). A pressing plate(26) is installed spaced from the base plate(24) in such a manner that a test sample is interposed between the base plate(24) and the pressing plate(26). A second acceleration sensor(27) is coupled to the pressing plate(26) in a concentric position with respect to the vibration shaft(21a) of the shaker(21).
