A grid has a frame body in a U-shaped cross-section defining a main plate section and two side plate sections. A rectangular opening is formed at the main plate section, and a plurality of grid wires extend in a lengthwise direction of the main plate section and at one side thereof. Each end portion of each grid wire is soldered to each lengthwise end portion of the main plate section under tension. For providing a scorotron charger, a discharge wire is positioned opposite to the grid wires with respect to the main plate section, and each end of the discharge wire is fixed to the frame body in such a manner that the discharge wire extends in parallel with the grid wires.