Disclosed are an apparatus and method for providing a one-to-many electronic contract signing service based on settlement amount settlement. An apparatus for providing a one-to-many electronic contract signing service based on settlement amount payment according to an embodiment of the present invention receives electronic contract information for concluding a one-to-many electronic contract between a contract creator and a plurality of contract participants, and generates electronic contract contents. content generation unit; The plurality of contract participants generates a link address for accessing the electronic contract content, and provides an interface for completing the contract by receiving contract conclusion information from the contract participant who has accessed the electronic contract content through the link address Based on the contract interface providing unit and the contract conclusion information input from the contract participant, the contract content is completed, the contract participant signs the contract content, and payment of the contract amount corresponding to the contract participant and a contract conclusion processing unit to process the one-to-many electronic contract.
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