PROBLEM TO BE SOLVED : To provide a real estate information disclosure system by which a tenant and an owner can directly conduct negotiation, etc., about a lease without homebuilder in between.SOLUTION : The Internet network 16 to transmit/receive real estate lease information, a server system 12 that stores, processes and manages real estate lease information, a real estate lease information transmission terminal 10 that transmits real estate lease information to the server system 12, and a real estate lease information retrieval condition transmission terminal 14 that transmits a retrieval request signal for real estate lease information to the server system 12 constitute a real estate lease information disclosure system, in which the server system 12 retrieves real estate lease information on the basis of the real estate lease information retrieval condition, and transmits retrieved real estate lease information to the real estate lease information retrieval condition transmission terminal 14. In addition, the owner side can disclose own real estate lease information on the Internet, and the tenant side can retrieve real estate lease information that meets own needs.