Henoch-Schonlein purpura (HSP) is the most common vasculitis of childhood. It is less common in adulthood. Charactarized by the storage of immunglobulin A (IgA), and its also called IgA vasculitis (IgAV). In this article, adult age case diagnosed as IgAV, with proteinuria at nephrotic level unresponsive to steroid treatment, is presented. The patient, who presented with typical rash, gastrointestinal and renal involvement, was administered monthly cyclophosphamide infusion due to increasing proteinuria despite steroid and azathioprine treatment. After the third cycle, the patients proteinuria significantly regressed and her treatment was continued with methylprednisolone and azathioprine. HSP, has no accepted treatment approach in adults. Renal involvement is more common in older children and adults, and it's the most important determinant of morbidity and mortality. In this article, we aimed to share our approach to a patient who presented with renal involvement at an adult age.