It is an object of the present invention to provide a method for preventing deterioration (oxidation, decomposition or the like) of various smell components, e.g., fragrance components such as perfumes or odor-causing components such as unsaturated fatty acids and a perfume composition in which deterioration of a perfume has been prevented (a stabilized perfume composition) and a deodorant composition capable of preventing deterioration of an unsaturated fatty acid. The method for preventing deterioration of a smell component according to the present invention is characterized by allowing D-glucopyranosylglycerol to coexist with a smell component. Examples of the smell components include perfumes and unsaturated fatty acids. The perfume composition of the present invention is characterized by containing at least one perfume and D-glucopyranosylglycerol as an active ingredient for preventing deterioration of the perfume. The deodorant composition of the present invention is characterized by containing D-glucopyranosylglycerol as an active ingredient for preventing deterioration of an unsaturated fatty acid.
