Abstract: A deflection yoke mounting apparatus for a color picture tube having a deflection yoke for deflecting electron beams generated by an electron gun to be securely fixed to a neck portion of a funnel of the picture tube to prevent deterioration of convergence and purity characteristics of the picture tube due to displacement of the yoke by an external shock. The apparatus includes a thermal shrinkage tube inserted over the outer periphery of the neck portion and thermally contracted into close contact with the neck portion, a neck contact member of the deflection yoke having a plurality of protrusions formed on its inner surface and engaged with the outer periphery of the thermal shrinkage tube, and a metallic band engaged with the outer periphery of the thermal shrinkage tube, the metallic band being engaged with the outer periphery of the neck contact member to press the contact member and the thermal shrinkage tube, thus fixing the yoke to the neck portion.