[Problem] To provide a metal connecting method and a metal connecting device to prevent a shot-circuit between the core wire and the shield portion by preventing the insulating inner coat from melting, and to surely connect the shield portion and the conductive member to each other.[Means for solving problem]The ground terminal 4 is wound around an outer periphery of the coaxial cable 3. A portion of the ground terminal 4 wound around the coaxial cable 3 is clipped between the pair of electrodes 11, 12. While the pair of electrodes 11, 12 is pressed in a direction close to each other, a current is applied to the pair of electrodes 11, 12. The current of a predetermined current value is applied for a predetermined time so that the insulating outer coat 34 is heated more than the melting point of the insulating outer coat 34, the braided wire 33 and the ground terminal 4 are connected to each other, and the insulating inner coat 32 is heated less than the melting point of the insulating inner coat 32.