Object: To provide an agent for sustaining satiety or a method for sustaining satiety, with which an individual's food intake is reduced by sustaining satiety, and as a result, pathological conditions such as obesity due to overeating can be prevented and improved. Means for Resolution: An agent for sustaining satiety containing D-psicose as an active ingredient and a method for sustaining satiety by the ingestion of D-psicose. Advantageous Effect: Satiety can be sustained although the increase in blood glucose level after eating is suppressed. A means for sustaining satiety which is useful for those who are anxious about their blood glucose level and those who are health conscious can be provided.