PROBLEM TO BE SOLVED : To support quick real estate trading.SOLUTION : A real estate trading support device comprises : trading application accepting means for accepting an application for real estate trading from a seller side terminal; bid management means for accepting a bid from a purchase agent by accepting input of a bidding price for the real estate from a purchase agent side terminal; purchase agent determination means for determining a purchase side agent which enters the maximum bidding price at the deadline for bidding as a purchase agent of the real estate; and trading information notification means for notifying the purchase agent side terminal of the purchase agent determined by the purchase agent determination means of the determination as a purchase agent of the real estate and notifying the seller side terminal of the maximum bidding price and information about the determined purchase agent.SELECTED DRAWING : Figure 1COPYRIGHT : (C)2018, JPO&INPIT