This container unit stores cargo in an internal space. The container unit is provided with: an outer wall part that forms the internal space and that has a thermal insulation space between a first surface thereof that is on the internal-space side and a second surface thereof that is on the opposite side; an inner wall part that is arranged to face the first surface of the outer wall part with a prescribed gap therebetween and that forms a circulation path between itself and the first surface; an air conditioning device that generates an airflow in the circulation path; and a first concave/convex structure that is provided to the first surface of the outer wall part and that has a plurality of recesses/protrusions that are formed along a direction that is orthogonal to the direction of the airflow generated in the circulation path.
