To provide a heat pipe where the heat pipe has an excellent capacity for absorbing a non-condensable gas such as a hydrogen gas thus exhibiting excellent heat transfer characteristics.The heat pipe includes: a container having a cavity portion inside the container; a wick structure disposed in the cavity portion; a working fluid sealed in the cavity portion; and a metal which absorbs hydrogen at 350° C. or below and releases no hydrogen at 350° C. or below, the metal being disposed in the cavity portion.