Onychomatricoma is a rare, benign tumor of the nail matrix that occurs in the middle age. Clinically, and classicaly it presents with the tetrad of exaggerated transverse curvature, nail plate thickening, splinter hemorrhages, and leuco-xanthonychia. Common dermoscopic features include longitudinal parallel white or yellow lines, parallel lesion edges, splinter hemorrhages, and the characteristic honeycomb-like cavities at the free edge. Onychomatricoma is commonly misdiagnosed as onychomycosis. The diagnosis is based on clinical and dermoscopic features like in our case Surgical excision remains the preferred treatment for onychomatricoma. After exposing the tumor by removing the nail plate and releasing the proximal fold, complete tangential excision is necessary to prevent recurrence. After excision and on histological examination, the longitudinal sections of the onychomatricoma show a gloved, spindly finger appearance lined by matrical epithelium. Here we describe a case of a 70-year-old man with onychomatricoma of his left ring finger. The diagnosis suspected clinically was confirmed by the dermoscopy of the free edge with the aspect of honey comb-like cavities.