The study describes the effects about the apartment management for second-hand market prices.1. The average of contract price shall be presumed by a control cost, a reserved fund and accounts receivable of control cost. The gap from the latest contract cost to the first one shall be presumed by a cleanup cost, a running cost of a management society, amount of decisions in conferences and accounts receivable of reserved fund.2. Those constantly make a positive contribution for the second-hand apartment market prices. On the other hand, any kind of accounts receivables make a negative contribution.