In this study, the rebound vibration characteristics of the internal mirror of SLR camera were investigated using experimental models. The mechanism of the mirror rebound phenomena is tested by using six types of rectangular metal plate models. The mirror (plates) model is supported by fixing its longitudinal edge on a horizontal rotatable shaft. The mirror plate swings down freely around a horizontal axis and hits with a stopper and this phenomenon simulate the motion. A laser displacement meter is used to measures the amount of rebound. The result reveals that the rebound amount and the vibration characteristics after the collision depend on the stopper position. Also, the vibration after the collision depends on the collision behavior and when the amount of rebound is small, there is a tendency that the vibration after the collision becomes large.