UV　B　irradiation　induced　cutaneous　damage　is　the　result　of　cellular　oxidative　stress.As　a　dismutase　which　can　traverse　across　the　cell　membrane　to　quench　potent　inside　the　cell,PTD-SOD　was　expected　to　be　effective　prevention　or　alleviation　of　cutaneous　damage　caused　by　LTVB.This　study　by　to　UVB.This　study　was　to　verify　the　assumption.