There has been a demand in the marketplace for medicines, functional foods and so on which can relieve subjective symptoms of fatigue in persons having these subjective symptoms, and enabling the persons to have productive days. That is, an object of the present invention is to provide a composition for relieving subjective symptoms of fatigue. According to the present invention, a safe and effective composition for relieving subjective symptoms of fatigue which contains ornithine or a salt thereof as an active ingredient can be provided.