The ovaries of edible medusa(Rhopilema esculenta) were diassectedand observed by histological sections and scanning of E. M. It was discovered that theovary is fold-type. It's one side connects with gelatinous membrane while the otherside is isolated. Gelatinous membrane is a single layer of ciliated cells, on the outerconsists of spongiocyte. On the side of gelatinous membrane of ovary is one layer ofepithelium which made up of germinal epithelium. The gelatinous membrane andgerminal epithelium connect by colloid fine filaments. Germinal epithelium varies greatyl in spawning season.It accoplishes the func-tion of oogensis at first and gradually dissolves into hyaline little area thereafter. During maturation of the ovary germinal epithelium diffuses locally and the round,oval ova becomes caked. A great deal of ovum discharged in hatches, it is the maintype of ovulation in edible medusa, but diecharge of single ovum also exists.