Provided is a compact and lightweight transport box, in which inside temperature variation is minimized, and which allows for accurate temperature regulation. The transport box comprises: an insulating container (5)； an internal heat conducting container (8) mounted inside the insulating container (5)； and an exposed insulating cover body (6) in which a cover internal side heat conducting plate (35) on the inside surface faces the opening part of the internal heat conducting container (8). In a state in which the opening part of the insulating container (5) is blocked by the insulating cover body (6), the cover internal side heat conducting plate (35) is near the opening end (17) of the internal heat conducting container (8).
