An air discharge device installed in an air conditioner to discharge and guide air air-conditioned in the air conditioner to an outside is provided. The air discharge device may include a first outer body having an air discharge grill; a second outer body coupled to a first side of the first outer body; a third outer body coupled to a second side of the first outer body and coupled with the second outer body; a first inner guide having an inner opening that faces the air discharge grill; and a second inner guide coupled with the first inner guide, and together with the first inner guide, forming an internal flow path. The first outer body, the second outer body, and the third outer body may be coupled with one another into a shape of a hollow cylinder.