As Euro NCAP implemented grid method test of pedestrian protection from 2013, Correlation between test and simulation is a matter which is increasingly important in the vehicle safety. Because pedestrian grid validation need about 150 impact point in a vehicle and it is difficult that all of impact points have test performances. This study is about bonnet damper made of rubber to improve correlation accuracy. In Vehicle CAE filed, damper is used to absorb impact energy or prevent slam with several modeling method of simulation programs depend on characteristic. Our study about material characteristics of bonnet damper will help to understand how much influence on pedestrian injury and what is best way to represent damper property in pedestrian head crash impact with LS-DYNA simulation program.