A pulse photometry probe includes: a light emitter having a first face from which light is emitted toward a living body a light receiver having a second face which receives the light from the living body a surface sheet which faces the first face of the light emitter and the second face of the light receiver a cover sheet in which at least one slit is formed and a lead wire which includes: a first lead wire connected to one of the light emitter and the light receiver a second lead wire connected to the other one of the light emitter and the light receiver and a basal portion at which the first lead wire and the second lead wire are bundled. The second lead wire includes at least one slack portion between the basal portion and the other one of the light emitter and the light receiver.
