To easily set a space shape condition for the selection of a speaker without the preparation of CAD data in condition setting, in an acoustic design support device and a program, and automatically select an optimum concrete speaker based on the space shape condition.

This device comprises a GUI selectively setting a rough shape such as fan shape or a square as the rough shape of a space such as acoustic facility, so that, for example, a fan or square shape can be selected in shape selection 11C. When the fan shape is selected, a plurality of shape examples classified to the fan shape are presented in shape selection 11D. When one of the shapes of the shape selection 11D is selected, a data input is accepted. An optimum speaker is automatically selected from a speaker selection table.