Cyclosporin A (CsA) is used as an inmunosuppressive agent and its prominent side effect is the induction of gingival overgrowth. The etiologies of CsA-induced gingival overgrowth are somewhat controversial due to different opinions among the oral hygiene, gingival inflammation, and severity of periodontilis. This report was to present the clinical and radiographic characteristics of a patient with CsA induced gingival overgrowth treated with nonsurgical periodontal therapy.