A infrared optical biosensing apparatus is provided which includes: a probe including an infrared light emitting element which emits infrared light, an output variation detection element which detects output variation of the infrared light emitting element, and a light receiving element which detects the infrared light scattered in a living organism and an operation unit which calculates information on the living organism based on output data of the light receiving element. The operation unit corrects the information on the living organism in accordance with a detection result of the output variation detection element.
