It is desirable to provide a medicament or nutritional food to improve feeling of cold and to create fulfilling life for people who are suffering from feeling of cold. Specifically, one object of the present invention is to provide an, agent, a food and drink, or a food additive which can be used for improving feeling of cold. An agent, a food and drink, or a food additive for improving feeling of cold containing ornithine or a salt thereof as an active ingredient can be provided according to the present invention.