Sixteen male rats were tested for mating behavior after 1-9 days of starvation. All males copulated after 3 days food deprivation, the only statistically significant changes being an increase in the delay preceding the initial intromission and in the frequency of mounts without intromission. After longer periods of starvation some males failed to achieve intromission or ejaculation, but even when deprived 8-9 days, 11 of 16 males ejaculated without marked changes in most measures of their sexual behavior.