Drowsiness of a human may be caused by an underlying disease such as sleep apnea syndrome in some cases, but not in other cases. Regardless of the cause, drowsiness occurring during driving of a vehicle or the like may in some cases lead to a serious accident involving loss of life. Accordingly, a technique is needed to analyze drowsiness level with high accuracy so as to prevent accidents and ensure safety. To solve this problem, a device for assessing drowsiness level is provided for calculating a drowsiness level of a living body based on a core body temperature and a surface temperature in a peripheral region of the living body.
