AIR CONDITIONER FOR VEHICLE

The present disclosure provides an air conditioner for a vehicle including a door disposed inside an air conditioning case and configured to adjust an opening degree of an air flow path including a first gear and a second gear coupled to the door or door driving components, wherein the first gear and the second gear include a first tooth and a second tooth meshing with each other, the first gear includes a rib protruding in an axial direction and a first cover disposed above the first tooth, and the second gear includes a first groove into which the rib is inserted and a second groove into which the first cover is inserted.