Abstract: The histological observation for the sex-pheromone gland of female Conopomorpha sinensis was conducted with scanning electron(SEM)and transmission electron microscopy(TEM).From images,it was clearly observed that the gland was a ventral fold cystiform situated in the dorsal segmental membrane between the eighth and ninth segments,its surface distributed with many conical objects.There was distinct intercellular conjugation with a tubular channel connected to the endepidermis.Microvilli were distributed on the basal fold of membrane.In the cytoplasm,there were obviously with smooth endoplasmic reticulum,mitochondria,ribosome,and glycogen granule.