Cutaneous pseudolymphoma (CPL) refers to a group of benign T or/and B-cell lymphoproliferative processes of diverse causes that resemble cutaneous lymphomas. Lymphomatoid contact dermatitis (LCD) is a form of CPL that was first described in 1976 by Orbaneja. Since then, various antigens have been reported to cause this type of CPL. A 72-year-old male with presented with an 1-year history of a solitary erythematous crusted patch on right temple. He had a medical history of allergic contact dermatitis, seborrheic dermatitis and diabetes mellitus. He had been regularly coloring his hair for several years. Punch biopsy revealed a dense, nodular, dermal infiltrate of lymphocytes that formed lymphoid follicles surrounded by well-defined mantle zones with scattered tingible-body macrophages. Immunohistochemical staining revealed nodular aggregates of CD20+ lymphocytes, infiltrate of predominantly CD3, 4, 5, 8 + lymphocytes, and positive for the germinal center cell markers Bcl-6, CD10, Bcl-2, and Ki-67. Polyclonal immunoglobulin H gene rearrangement was detected. The diagnosis of CPL was finally made based on the clinical, histologic, and molecular findings. The patient was treated with intralesional injection of triamcinolone acetonide and the lesion was resolved. We herein report a rare case of CPL caused by hair dye. Clinicians should be aware of potential causative agent of hair dye for the development of CPL.