Conventional indoor units suffer from the problem of design properties worsening by movement of a casing away from a wall surface and a gap forming between the casing and the wall surface. This indoor unit has a mounting plate (2) affixed to a wall surface, and a bottom frame (10) (casing) attached to the mounting plate (2). Furthermore, the bottom frame (10) (casing) has screw holes (73-76) (screw-affixing parts) for affixing the bottom frame (10) (casing) to the indoor wall surface.
