This research proposes a new model representing multi-layered dynamic supply chains and a new negotiation process among components in the model. The proposed model consists of three components named clients, manufacturers, and suppliers. The manufacturers generate and send both the orders of the parts to the suppliers and the offers of the products to the clients. The manufacturers continue to modify their production schedules after sending their orders of the parts to the suppliers, in order to improve their schedules to contract the ordered products. Therefore, the manufacturers are able to satisfy the requirements of the ordered products, even if the suppliers do not satisfy the requirement from the manufacturers. The effectiveness of the proposed model is verified through some computational experiments from the viewpoint of contract completion.