A vascular data generation apparatus (10) includes a first generating means (12) and a second generating means (13). The first generating means (12) generates first vascular data (17) based on anatomical statistics data (15) about vessels of an organ. This first vascular data has a tree structure representing a vascular network (17a) in the organ. The second generating means (13) generates second vascular data (18) representing a plurality of vessels (18a) that connect a plurality of nodes (16a) in a geometric model (16) of the organ with the vascular network (17a) represented by the first vascular data (17).
