A developmental view may help clarify confusions that exist regarding masochism. Following Loewenstein, I suggest that protomasochism be distinguished from masochism. Protomasochism comprises conditions prior to the oedipal period which may lead to masochism. Preoedipal precursors of masochism are organized and transformed during the oedipal stage and later. A conscious or unconscious genital sexual fantasy in which pain is an integral part may appear at that time. The demonstration of such a fantasy is essential for the definitive diagnosis of masochism. It is overdetermined and may result from a variety of dynamic configurations and genetic origins. In making those suggestions, I assume, following Freud, that erotogenic masochism is basic to all forms of masochism.