To provide a display device, a program and a storage medium for housing interior facility design, in which layout positions or height levels of various housing interior facilities can be designed so as to be convenient for a resident.

This device comprises a facility data storage means 1 storing data of housing interior facilities of a building, and a personal data storage means 3 storing data for the physical size or motions of a resident of the building. A display means 2 performs image display of housing interior facilities based on the data of the facility data storage means 1. A model forming means 4 forms a personal model P of the resident who lives in the building. The personal model P formed by the model forming means 4 is projected on a screen 14 of the display means 2 so as to be capable of taking motions according to the resident.