A dual purge ejector and a dual purge system using the same are provided. A first end of a main body is fully open and an ejecting end of a nozzle is located proximate to the opening hole. Therefore, even if the ejector is disconnected from an adapter, negative pressure is not formed in a main body, to prevent discharge of fuel evaporation gas into the atmosphere and a failure of the dual purge system may be reliably diagnosed.
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