Gas filling device

A gas filling device comprising:

• a filling mechanism for transporting gas from a gas supply source through a gas pipe;
• a main body housing having the filling mechanism therein;
• a filling hose connected to an outlet of the gas pipe of the filling mechanism;
• a support arm mechanism for supporting, via a wire, a filling nozzle provided at a tip of the filling hose:
• a mechanical winding device provided at an end of the support arm mechanism;
• and
• a guide provided at another end of the support arm mechanism for guiding a wire led out from the mechanical winding device to an opening formed in a lower cover of the support arm mechanism
• wherein said guide is provided with a reeling roller that sends the wire from the mechanical winding device to an opening, and a holding roller that restricts the wire from moving upward, and the wire is sandwiched between the reeling roller and the holding roller,
• wherein said reeling roller and holding roller are supported by a roller holding bracket, and a distance from an axis of a rotation shaft of the holding roller to a lower edge of the roller support bracket is a distance that ensures a strength required for the roller support bracket to reliably support a load acting on the holding roller.