There are provided a shape data generation apparatus and shape data generation program capable of arranging, on one sheet-like medium, parts obtained by slicing one cutting shape. A shape data generation apparatus includes a slicing unit (11) configured to slice a cutting shape represented by supplied shape data into a plurality of parts in accordance with a closed shape prepared in advance, an arrangement unit (12) configured to arrange, of the cutting shape, a part protruding from the closed shape to fit in a free space within the closed shape, and a generation unit (13) configured to generate shape data representing a plurality of parts fitted in the closed shape.