Connector check valve for hydrogenation

The invention provides a connector check valve for hydrogenation, which improves low-pressure airtight performance through a simple structure, and reduces noise and deformation caused by chatter vibration in a low-pressure section of a hydrogen tank. To this end, the connector check valve for hydrogenation according to the present invention comprises: a first body in which a first internal flow path extending from one end to the other end is formed; a second main body in which a second internal flow path extending from one end to the other end is formed, one end of the second main body being coupled to the first main body by being inserted into the first internal flow path through the other end of the first main body; a sealing member that is disposed in the first internal flow path, seals a space between the inner peripheral surface of the first body and one end of the second body, and forms a third internal flow path that extends from one end to the other end, and guides hydrogen that has flowed into the fi