A three-dimensional shape is displayed at a high speed on the basis of compressed data. A subdivision pattern for at least one face that forms the three-dimensional shape is determined on the basis of three-dimensional shape data (2) that defines the three-dimensional shape by the face (step S2). At the same time a curved face shape of the face is determined on the basis of the position of the vertices of the face and the direction of normals at the vertices defined in advance in the three-dimensional shape data (2) (step S3). Then the determined curved face shape is subdivided according to the determined subdivision pattern and a plurality of faces are generated on the curved face shape (step S4). A three-dimensional shape formed by the plurality of faces generated is displayed (step S5). IMAGE
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