Disclosed is a manufacturing apparatus of a light-emitting element including: a main transporting route extending in a first direction, the main transporting route comprising first and second transfer devices connected through a first transporting chamber; a sub-transporting route extending in a second direction intersecting the first direction, the sub-transporting route comprising a second transporting chamber connected to the first or second transfer device and a delivery chamber connected to the second transfer chamber; and a plurality of first treatment chambers connected to the delivery chamber. The main transporting route is configured to transfer a substrate to be treated in a horizontal state, and one of the plurality of treatment chambers is configured to hold the substrate in a vertical state during treatment.