VIBRATION TESTING JIG

A vibration test jig (10) includes: a base (11) installed on a vibration table, including a mounting surface (11a) on which the end of the test body is mounted; a top plate (12) placed on the base (11) with a gap therebetween, including a slot (16) and a wedge fitting groove (13), the slot (16) having an inner surface (16a) that presses the end of the test body toward the mounting surface (11a), and the wedge fitting groove (13) located in an extending direction of the slot (16) and communicating with the slot (16); a wedge portion (23) configured to be fit into the wedge fitting groove (13); and pressing members (14) arranged along the slot (16) and configured to press the top plate (12) toward the base (11). An inner surface of the wedge fitting groove (13) includes a bottom surface (13a) and a pair of holding surfaces (13s and 13s) located on both sides in a width direction of the wedge fitting groove (13) and facing the bottom surface (13a) across an inner space of the wedge fitting groove (13); and the wedge portion (23) is in surface contact with the bottom surface (13a) and the pair of holding surfaces (13s and 13s).