PROBLEM TO BE SOLVED: To provide a configuration that can create a circuit substrate model for performing simulation evaluating an electromagnetic influence of a circuit substrate as three-dimensional data while suppressing workload.SOLUTION: A circuit substrate model generating device 10 comprises a storage part 32 that associates a plurality of candidate components to be selection candidates with three-dimensional information and characteristic values of the respective candidate components, and stores them. A CPU 21 functions so as to create data of a circuit substrate model obtained by incorporating, in a wiring structure specified by wiring shape data, configuration of the candidate components each corresponding to component type data of the electronic component in each position into the positions of electronic components specified by plural pieces of the component position data while reflecting three-dimensional information and a characteristic value of each candidate component.
