Psoriasis is a chronic inflammatory dermatosis with distinct microvascular changes. Renal involvement comparising mainly of asymptomatic hematuria and proteinuria have been reported previously. Primary glomerulonephritis is not common during the course of psoriasis. Various studies have been undertaken in an effort to confirm the etiology of glomerular disease associated with psoriasis. There are also arguments supporting the role of underlying genetic and immunologic mechanisms for disease pathophysiology. The cause of the nephrotoxicity is the renal toxicity of the systemic medications that are renal disease is administrated for the treatment of psoriasis. In this report we present a patient with membranous glomerulonephritis who previously diagnosed as psoriasis, without use of previous systemic nephrotoxic medications or a history of joint involvement.