The object of this invention is to provide a sales support system of sales subjects by which the date of delivery (delivery date) of sales subjects including commodities, products or service may be shortened.In order to achieve the object, the sales support system of this invention has a terminal system 51 which is provided with input means to input information related to the sales subject received from the customer and a display means which may display information related to the sales subject to the customer and an information management section 53 which is connected and may communicate with the terminal system and includes information related to the sales product and purchase order for the sales product and receives the purchase order of the sales subject from the terminal system and determines the facility which may provide the ordered sales subject.