Since its introduction by Melanie Klein in 1946 the concept of projective identification has inspired, baffled, rankled, but always mesmerized its adherents and opponents alike. I offer in this paper a brief outline of the concept's development over the past fifty years by way of some thoughts on a personal journey of discovery surrounding its meaning and clinical usefulness to my work as a child therapist. I would like to suggest that definitions in current use seem to be derived more from adult work than from work with children, which has sometimes skewed the debate surrounding the concept in a particular direction. In both its conceptual guises, namely, as an unconscious ‘phantasy’ and as an interpersonal feature of the transference, projective identification is a logical extension of certain aspects of Klein's work with small children. In child work too the developmental status of the concept comes more into focus.