The present invention relates to a composition including a Laurus nobilis leaf extract as an active ingredient, and particularly, to a composition for preventing or treating hangover including the Laurus nobilis leaf extract, a food composition for preventing or relieving hangover including the Laurus nobilis leaf extract, and a method for preparing the composition. Since the composition according to the present invention includes the Laurus nobilis leaf extract, it has a remarkably excellent effect of lowering blood concentrations of alcohol and acetaldehyde. Its hangover-preventing and treating effects were confirmed by behavioral tests, and thus the composition can be widely applied to foods, drugs, or functional health foods which can be effectively used for preventing and treating hangover.