The 50-minute hour is a feature of psychoanalytic work that is most commonly discussed in the context of case reports. This paper examines it as a concept. The author starts by describing the origin of the 50-minute hour and its development as an element of the psychoanalytic setting or framework. Next, he considers the significance of the clock as a relational factor in the session and reflects on the alienness of the time of day to the unconscious, and the consequences of this alienness. He then uses a clinical example to illustrate the phenomenon of the stretching effect of time in analytic sessions. Finally, the author demonstrates how cleverly the 50-minute hour excises the time needed for unconscious processes from our accelerated present; he shows that it challenges the social convention of time, and has a structuring effect in that it “times” psychic processes.