Total 87 cases of children's glomerulonephritldes confirmed by renal b.jopsy and immunoelectron microscopy were analysed with densitometer and other radiologic methods.The results were as follows :1. In the total 87 cases of children 's glomerulonephritides, APSGN is the most prevalent disease.MSPGN , pupura nephritis, MLNS were followed in descending orders.2. They were more in male children (M:F = 2.3:1) 3. The size , width and cortical thickness of kidney were apt to be increased before the age of 10 years, but not helpful after the age of 10. Radiologic findings and densitometry findings:a. APSGN ; Pulmonary congestion or congestive heart fallure findin 뚱 were found in 69%b. MSPGN in plain chest film , and decreased excretory function in densitometry even though no morphologic abnorrriality in IVP.; Renal enlargement and cortical scallopings were main findings in IVP study.Excretory function is slight decreased in densitometry only.Pulmonary congestion was not evident.