To provide a vibration test system capable of exciting simultaneously in each direction of xyz-axes of a test body only by a vibration test in one direction, and exciting to acquire desired accelerations in each direction of the xyz-axes of the test body, by using a uniaxial vibration testing device.

This device is equipped with a test body mounting tool 30 on which the test body is mounted; a vibration stand mounting tool 20 formed to have a shape wherein a loading surface of the test body is tilted, and having a bolt mounting hole 21 for mounting a bolt on a vibration stand 12 and a bolt mounting hole 22 for mounting the test body mounting tool 30 on the loading surface so that each direction of the xyz-axes of the test body is in the tilted state as much as a prescribed angle respectively to each direction of the xyz-axes of the vibration stand 12; acceleration adjusting devices 41A, 41B for adjusting each acceleration in the yz-axis directions of the test body mounted on the vibration stand mounting tool 20 through the test body mounting tool 30; and an acceleration adjusting control device 40 for controlling the acceleration adjusting devices 41A, 41B.