Abstract: Disclosed is an indoor unit for an air conditioner to solve drain problem of condensed water. The indoor unit includes: a lower frame provided with a suction inlet through which exterior air is inhaled; a middle frame spaced upward apart from the lower frame by a predetermined distance; an indoor heat exchanger for performing heat exchange; and a drain pan for collecting and draining condensed water generated in the indoor heat exchanger, the drain pan being mounted selectively on the lower frame or the middle frame.

Abstract: Disclosed is an indoor unit for an air conditioner to smoothly drain condensed water to the outside regardless of an installation state of the indoor unit. The indoor unit includes: a heat exchanger for performing heat exchange; a drain pan for collecting and draining condensed water generated in the heat exchanger; and two or more drain parts formed in the drain pan and through which the condensed water is drained.