The number of errors, caused by a displacement of a biological sensor from a placement position, of sensing results is reduced. Biological information detected by a biological information detection unit that is placed in a specified portion of a living thing and is configured to detect the biological information of the living thing is obtained, the amount of a displacement detected by a position displacement detection unit that detects the amount of the displacement of the position of the biological information detection unit from the specified position when the biological information is detected is obtained, and optimum biological information is estimated from the obtained biological information in accordance with the amount of the displacement.
