Serological identification tests were carried out with many strains obtained from an otolaryngologic clinic, from oral cavities of dental patients and from other laboratories. The tests were performed through the slide agglutination method using monospecific or absorbed antisera based on the antigenic structures. The results of serological tests were compared with biological identifications. Since serological identifications alone were found to coincide well with the correlative identifications by biological and serological methods, it is concluded that the identification test using monospecific antisera, based on the antigenic structures of the genusCandida, is a useful and reliable method for a rapid identification of species.