The association of malignancy with glomerulonephritis is well known. The most frequent observed renal lesions associated with malignancy are the membranous glomerulonephritis on carcinoma and minimal change nephrotic syndrome on Hodgkin's disease. Recently, IgA nephropathy associated with liver disease, connective tissue disease, gastrointestinal disease, dermatologic disease, hematologic disease and malignancy were reported. But the relationship between malignancy and IgA nephropathy is not clearly resolved. Here we report a case of IgA nephropathy associated with early gastirc cancer. Successful treatment of early gastric cancer didn't completely resolve the IgA nephropathy but led to a significant reduction of hematuria and loss of proteinuria. Therefore we suggest that a certain association between IgA nephropathy and early gastric cancer can be made by studying the course of the disease.