Histochemical and ultrastructural properties on the cutaneous mucous glands of the water toad, Bufo stejnegeri Schmidt, are studied with light and electron microscopes. Mucous glands of the water toad are simple alveolar glands which are composed of gland cavity in dermis and gland duct in epidermis. Each gland cavity of the mucous glands is consisted of outmost myoepithelial cells, glandular epithelial cells and inner cavity. Gland cavities of the mucous glands are composed of four kinds of glandular epithelial cells which are the dark cell, the light cell, the mucous containing cell and the small cell. Secretory materials which are certified as acid mucopolysaccharides by the histochemical reactions are synthesized through the Golgi complexes of the mucous containing cells.