Lichen planus pigmentosus (LPP) is a rare clinical variant of the lichen planus. It presents with pigmented, dark brown macular lesions on the flexural or sun exposed regions. Linear LPP is presented with hyperpigmented lesions along the lines of Blaschko. To the best of our knowledge, there are a few cases of linear LPP which have been reported in the literature. In our case report, we present a female Turkish patient with unilateral linear LPP that manifested as asymptomatic brown macular lesions, distributed along the lines of Blaschko between the middle part of the left gluteal region and the left calf.