Changes in the pitch of a short tone pulse (25 msec, 1000 Hz), following a leading tone, were measured at various leading-tone frequencies and for various time intervals between the leading tone and the tone pulse. The results show that poststimulatory pitch shifts away from the pitch of the leading tone are significant and reproducible. It is suggested that poststimulatory pitch shifts may influence the results of various psychoacoustic experiments on pitch perception.