One of the diseases leading to chronic end-stage renal disease is membranous nephropathy (MN). The main cause of this disease is the formation of antibodies to foreign and native antigens. Membranous nephropathy can be conventionally divided into 2 types: primary form (when the primary disease is unknown) and secondary form. Detection of appropriate antibodies is one of the methods to recognize and differentiate primary and secondary forms. A large role in non-invasive diagnosis of MN and differentiation of the primary form from the secondary play antinuclear antibodies (ANA), antibodies against granulocyte cytoplasm (ANCA), antiglomerular basement antibodies (anti-GBM) and phospholipase A2 receptor antibodies (anti-PLA2R). Differentiation matters when choosing a treatment choice. In the primary form, it is immunosuppression, and in the form of secondary treatment, it consists in curing or controlling diseases that can cause symptoms of MN. The aim: Analysis of serological methods helpful in immunodiagnosis of membranous nephropathy.