To evaluate a holder, under conditions that are similar to those of an actual holder, in an apparatus for that evaluates and tests the strength of the holder.

By having a shaft 3, on which an inner wheel 2a of a ball bearing 2 is mounted, a housing 4 on which its outer wheel 2b is mounted, a driver 6 for rotating the shaft 3; while a unit having the shaft 3 supported by the bearing 2 on the housing 4, is assembled, and a vibrator 5 for applying vibration to the unit, while the shaft 3 that is rotated by the driver 6 provided, housings 4 and 4' are vibrated, or the like, while the ball bearing 2 is operated so as to have the holder 2c broken.