Disclosed is a manufacturing apparatus of a light-emitting element. The manufacturing apparatus includes: a main transporting route including a first transfer device and a second transfer device connected to each other through a first transporting chamber; a sub-transporting route extending in a direction intersecting the main transporting route, the sub-transporting route including: a second transporting chamber connected to the first transfer device or the second transfer device; and a delivery chamber connected to the second transporting chamber; and a plurality of treatment chambers connected to the delivery chamber. A region to which the first transfer device, the second transfer device, the first transporting chamber, and the second transporting chamber are connected is under a continuous vacuum environment.