A three-dimensional data generating apparatus includes an input curve receiving unit configured to receive input of a curve indicating a relationship between a height and a distance from an outline of a target area to each position within the target area, a three-dimensional shape of the target area being generated from a two-dimensional image; and a three-dimensional data generating unit configured to calculate the height at each of the positions within the target area in accordance with the distance, the distance being calculated from a point on the outline to a corresponding position of the positions, and to generate data representing the three-dimensional shape of the target area based on the calculated height.