The parotid gland of monkey (Cercopithecus ethiops) was examined by electron microscopy. Secretory granules show a bipartite, or sometimes a tripartite structure consisting of a main portion and of one or two dense bodies contained in it. Discharge of secretion into the lumen seems to take place following the fusion of the membrane of the secretory granule with the plasmalemma. This seems to take place with the dense bodies in intimate contact with the fusion-area of the granule membrane.