Abstract: A VTOL aircraft (moving object) includes: a first communication path allowing a cabin (passenger compartment) and a component compartment to communicate with each other; and a second communication path for opening the component compartment to the outside of a fuselage. A portion of air in the cabin flows through a first circulation path and returns to the cabin, and the remaining air in the cabin flows through the first communication path and is introduced into the component compartment. A portion of air in the component compartment flows through a second circulation path and returns to the component compartment, and the remaining air in the component compartment flows through the second communication path and is discharged to the outside of the fuselage.