PROBLEM TO BE SOLVED : To provide a portfolio analyzing device capable of easily performing portfolio analysis in real estate investment.SOLUTION : The portfolio analyzing device for performing analysis of real estate portfolio comprises an attribute data storing means for inputting and storing attribute data of a plurality of real estate properties, an account settlement data storing means for inputting and storing account settlement data for real estate property operation, a standardized rule storing means for storing standardized rule information for standardizing account settlement data used for analysis, a standardized data creating means for referring to the standardized rule information and converting the account settlement data stored by the account settlement data storing means into predetermined standardized data, a standardized data storing means for storing the standardized data, and an index calculating means for calculating the index based on the attribute data of the real estate properties stored by the attribute data storing means and the standardized data stored by the standardized data storing means.COPYRIGHT : (C)2008, JPO&INPIT