Gas supply device equipped with connector transfer unit and connector coupling method therefor

The purpose of the present invention is to provide: a gas supply device provided with a connector transfer unit capable of improving durability of components by minimizing wear of a screw thread when a valve connector and a connecting piping connector are coupled; and a connector coupling method for the gas supply device. In order to implement the same, the gas supply device comprises: a connector fastening part including a connection piping connector, one side and the other side of which are respectively connected to a valve connector and a gas demand point provided in a container, wherein a connection piping connector housing surrounds an outer side of the connection piping connector and is configured to rotate together with the connection piping connector; a first transfer mechanism for transferring the entire connector fastening part in the direction of the valve connector; and a connector transfer unit for transferring the connection piping connector in the direction of the valve connector. 本发明的目的在于提供一种配