A product design apparatus ( 2 ) includes: a storage unit ( 20 ) for storing 3D CAD-based model data ( 21 ) of a plurality of products different from one another in terms of design and 2D product projection data ( 22 ) corresponding to the 3D CAD-based model data; a list display section ( 27 ) for displaying a list of the product projection data ( 22 ) on a screen; a 3D modeling program ( 25 ) for displaying the 3D CAD-based model data corresponding to the specified product projection data on the screen and for performing a shape modification through an operator's operation; and the storage unit ( 20 ) for storing designed data ( 24 ). Since a design can be performed based on the data that has been selected from the displayed data list, a product close to the customer's image can be designed in a short time, thereby shortening the time for determination of the design.
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