We report the case of a bilateral, relatively huge, multilocular spermatocele diagnosed at sonography with surgical and pathological correlation. A 45-year-old man presented with bilateral, large inguinoscrotal masses. He had had the masses since his adolescence and their size gradually increased in the past 5 years. Scrotal ultrasonographic examination showed cystic fluid masses that were 65 x 45 x 50 mm in size on the right and 55 x 45 x 40 mm in size on the left side in multilocular spaces. The cystic masses were excised via bilateral inguinoscrotal incision staying near the body of the epididymis. The patient had fathered three children with no fertility problem.