A muscle fatigue remedy that for persons with the symptoms of muscle pain attributed to strenuous exercise, lassitude in the arms and legs attributed to acute exercise, lower back pain and stiffness in the shoulder attributed to taking of a certain posture over a prolonged period of time, etc., relieves the symptoms and allows them to have a fulfilling life. There is provided a muscle fatigue remedy containing alanylglutamine or its salt as an active ingredient.
