Abstract: The spermatogenesis of Camponotus japonic in histolgical levels was studied.Five stages in spermatogenesis of Camponotus japonic were distinguished and described respectively according to the changes of the shape of spermatocyte and nucleus.The five stages were spermatogonia,primary spermatocyte,second spermatocyte spermatocyte,sperm cell and spermiogenesis.