This device for constructing a blood-vessel-shape model in order to perform blood-flow analysis using computational fluid dynamics is provided with: an input unit which inputs a medical image； a shape-model generation unit which constructs, based on the medical image, a blood-vessel-shape model； a shape-model-quality evaluation unit which evaluates the shape reproduction degree of the constructed blood-vessel-shape model to determine the quality of the blood-vessel-shape model； and an output unit which outputs the determination result and the constructed blood-vessel-shape model.
