SEARCH DEVICE, SEARCH METHOD AND SEARCH PROGRAM

The invention provides a search device, a search method and a search program, which can extract a target part from a file with high precision by searching based on natural sentences. The search device(1) includes a module feature amount calculation unit (12) which extracts a keyword group from each of a plurality of modules obtained by dividing a document and which calculates data characterizingthe keyword group as a feature amount for the module; a search feature amount calculation unit (13) which receives a search request using a natural sentence so as to extract a keyword group from the natural sentence and which calculates data characterizing the keyword group as a feature amount for the search request; and a module selection unit (14) which selects, based on the degrees of matchingbetween the feature amounts for the individual modules and the feature amount for the search request, a module corresponding to the search request as the result of a search. 本发明提供能够通过基于自然语句的检索而从文件中高精度地提取目标部位的检索装置、检索方法及检索程序。检索装置