Lichen striatus is a fairly uncommon dermatosis manifests as linear and papular eruptiondistributed along with Blaschko’s line. As a rule, it occurs in children from 5 to 15 years of age. We present two cases of lichen striatus occurred in adults. The first case is a 37-year-old man who presented with brownish linear papules on the trunk and left lower leg occurred about 4 months ago. The second case is a 29-year-old woman who presented with a linear brownish papules on the right lower leg occurred about 1 year ago. Histopathologic findings showed lichenoid, lymphocytic infiltrate in the papillary dermis with vacuolar degeneration of the basal layer, and periadnexal inflammatory infiltrate in the reticular dermis in the both cases. Based on these findings both of them were diagnosed with lichen striatus. Herein, we report two cases of lichen striatus occurred in adults which is rarely reported in the Korean literature.