PRODUCT RETRIEVAL DEVICE AND PROGRAM OF PRODUCT RETRIEVAL METHOD

PROBLEM TO BE SOLVED: To attain a product retrieval device or the like that performs a retrieval at high speed.SOLUTION: A product retrieval device comprises: a database 2 which stores an attribute which is a cause of difference of specifications of the same type of products as an attribute type and a value of an attribute type which a product can take as an attribute value, and further stores combinations of attribute values that can be taken in the relationship among a plurality of attribute types as conditions; and a data management device 1 including combination retrieval processing means 1C which, using the attribute types as nodes and the attribute values as branches, performs creation processing of a node of a certain attribute type and branches of the certain attribute type, creates branches and nodes, which satisfy conditions for the branches of the node of the creation processing, continuously to generate a tree, and performs retrieval processing for extracting a product related to a combination of attribute values created to the terminal branch as an arrangement possible product.