PURPOSE: To obtain a control grid which can form a print dot with good accuracy and high resolution by forming facing side of each toner carrier on two sides facing each other through a toner through hole except a crossing position in a loop electrode and two sides facing each other of another loop electrode in approximately the same plane.

CONSTITUTION: Bonding together of loop electrodes 11 and 21 formed respectively on an upper pattern and a lower pattern is performed while heat setting resins with which the loop electrodes 11 and 21 are covered are melted and cured. In the formed control grid, the upper face of two sides 11A of the loop electrode corresponding to a toner through hole 3a coincides with the upper face of two sides 21A of the other loop electrode and the loop electrode of the upper pattern and the loop electrode of the lower pattern are positioned up and down through an insulation layer at the crossing positions 11B and 21B to be able to obtain a sufficient thickness for the insulation layer.