An object of the present invention is to provide an anti-skin aging agent that can prevent skin aging such as spots, dullness, wrinkles, sags, and skin roughness. It has been found that resveratrol 3-O-α-glucoside has remarkable anti-skin aging effects such as melanogenesis suppression, hyaluronidase inhibition, anti-oxidization, cell activation, sirtuin gene activation, matrix metalloproteinase suppression, and anti-inflammation, and thus, can be used as an anti-skin aging agent.