Provided is a technology that enables biological information relating to a subject to be processed appropriately and independently of on the subject. A biological information processing device according to the present embodiment includes a storage device, an estimation unit, an acquisition unit, and a correction unit. The storage unit stores biological information relating to a specified subject for a unit period including a plurality of times. The estimation unit estimates variable characteristics of the biological information based on the stored biological information relating to the specified subject. The acquisition unit acquires the biological information relating to the specified subject together with information indicating a measurement time of the biological information. The correction unit corrects the acquired biological information relating to the specified subject based on the information indicating the measurement time, which is acquired together with the biological information, and the estimated variable characteristics.
