Pityriasis rotunda (PR) is a rare keratinizing disorder characterized by scaly, round, hypo- or hyperpigmented plaques mainly on the trunk and limbs. The histologic findings are similar to ichthyosis vulgaris. It was initially described in Japan but was demonstrated in the South Africa and some in caucasians from Mediterranean area. We report a case of 30-year-old male patient presenting with several patches on the trunk and arms. He had no symptoms and the lesions did not show any inflammatory changes such as oozing. He did not have any history of systemic diseases or drug use except antifungals due to onychomycosis. Family history was negative. Cutaneous examination revealed scattered egg-sized light brownish round patches with sharply outlined ichthyosiform surface on the abdomen and both arms. Histopathologic findings revealed orthokeratotic hyperkeratosis with diminished granular layer. PAS and GMS staining were negative for fungal hyphae. Based on these findings, the diagnosis of pityriasis rotunda was made. The etiology of pityriasis rotunda remains unknown. Clinically, the differential diagnoses include tinea versicolor, tinea corporis erythrasma, fixed-drug eruption and pityriasis alba. So, Clinicians should consider the diagnosis of pityriasis rotunda when they meet a patient showing discrete round, scaly pigmented patches.