A compartment interior air-conditioning device (30) is equipped with a first composition adjustment unit (40) and a second composition adjustment unit (60). The first composition adjustment unit (40) separates supply air having a composition which differs from the composition of the air outside the compartment from the air outside the compartment, and supplies the supply air to the interior of a transport container (1). The second composition adjustment unit (60) separates discharge air having a composition which differs from the composition of the air inside the compartment from the air inside the compartment, and discharges this discharge air to the exterior of the transport container (1). This compartment interior air-conditioning device (30) makes it possible to appropriately control the composition of the air inside the compartment of a transport container (1).
