The present paper reports analyses of milk from a Stineger's beaked whale (Mesoplodon stejnegeri) which was stranded at Noto-machi, Ishikawa Prefecture, Japan on 29 April, 2002. Fifty milliliters of milk were taken about 15 hours after death by incising the mammary glands. Milk consists protein; 11.7%, fat; 35.1%, carbohydrate; 0.8%, and ash; 0.8%. Contents of protein and fat are greater than those reported for a beaked whale which was stranded at Ninilchik, Alaska on 21 October, 1980 (the literature 7 cited). As minerals, sodium, potassium, calcium, iron, magnesium and zinc were analyzed. Calcium content was 65 mg/100 g of milk, which was extremely less than reported for the above whale. Fatty acids composition was characterized by high content of oleic, palmitic, palmitoleic and myristic acids in order. Especially, content of oleic acid is the highest, which is about 50 % of all fatty acids detected.
