Provided is a compact lightweight transport box in which the internal temperature distribution is minimized and accurate temperature regulation can be performed. The transport box includes an insulating container (5), an internal heat conducting container (8) mounted in the insulating container, and an insulating cover body (6) with a cover internal side heat conducting plate (35) exposed on an inner surface facing the opening part of the internal heat conducting container (8), in which, with the opening part of the insulating container (5) closed by the insulating cover body (6), the cover internal side heat conducting plate (35) is near an opening end (17) of the internal heat conducting container (8).
