The present invention forms the aperture in the opening flange of the deflection coil on the miss convergence (mis-convergence) problems of distortion, color cathode-ray tubes with the deflection yoke to improve the BSN characteristic, without affecting the nature of the screen that appears.; This invention is horizontal to the electron beam emitted from an electron gun, deflection coils and the ferrite core to reduce the loss of the magnetic force generated by the deflection coils to enhance a magnetic efficiency, the deflection coil and the fixed position of the ferrite core for the vertical deflection in fixed to sikimyeo in the color cathode-ray tubes deflection including the holders for the insulation between the deflection coil yoke, the deflection coil has an opening formed at the opening side end of the neck portion flange, it said holder is formed on a neck side end of the holder flange, the main deflecting section formed between the neck portion flange and the flange opening, and is characterized in that the aperture is formed in the opening flange.
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