A structure analytic program is used to direct a computer to perform a process of analyzing the structure of a HDL data circuit, and efficiently analyzes a design product relating to a circuit design using a hardware description language (HDL) with the configuration including: an acquiring process of obtaining the circuit design data; a database structuring process of structuring a structure analyzing database based on the circuit design data; a replicating process of replicating the structure analyzing database; an element deleting process of deleting a predetermined element in the elements configuring the hardware description language data indicated by the replicate database from the replicate database that is the replicated structure analyzing database; and a structure analyzing process of performing the structure analysis on the replicate database from which the element is deleted in the element deleting process.