PROBLEM TO BE SOLVED: To integrally form an interior air discharge casing to be installed in a cabin, of synthetic resin, so that the casing can be inexpensively manufactured and easily installed in the cabin.;SOLUTION: The interior air discharge casing is integrally formed of synthetic resin, in a state that a ceiling wall, a pair of opposite first side walls, and a pair of opposite second side walls expand, wherein: the pair of first side walls extends and projects so that they can bend to be vertically suspended downward from the ceiling wall via a pair of first connecting bend portions from opposite outside edges of the ceiling wall; the pair of second side walls extends and projects so that they can bend to be vertically suspended downward from the ceiling wall via a pair of second connecting bend portions from the other opposite outside edges of the ceiling wall; and the ceiling wall, the pair of opposite first side walls, and the pair of opposite second side walls are configured to be able to be assembled into a three-dimensional shape from their expanded state.;COPYRIGHT: (C)2010,JPO&INPIT
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