It is aimed to provide a ground connection fitting capable of enhancing the reliability of connection of a ground wire to ground sections and a ground connection device using the same. A first ground connection fitting (1) connects a ground wire (E1) to a first bolt (B1) and a second bolt (B2), which a plurality of ground sections provided on a wall surface of a vehicle. The first ground connection fitting (1) includes a wire connecting portion formed by a wire-side terminal portion (4) to be mounted on an end of the ground wire (E1), and a ground-side terminal portion (5) formed with a first bolt connection hole (6) connectable to the first bolt (B1) and a second bolt connection hole (7) connectable to the second bolt (B2).