Abstract: A combination structure of the shadow mask and the mask frame is a combination structure including a shadow mask, being disposed inside a panel of a color cathode-ray tube and a mask frame, supporting the shadow mask. The combination structure is that the shadow mask is inserted in the mask frame so as to touch internally the skirt portion of the shadow mask on the flange portion, and then their contact portions are adhered to each other by welding process so as to serve to decrease the amount of doming together with miss-landing of electron beams, and to improve color purity of the screen when it is applied to a color cathode-ray tube. And the flange portion is curved from the welding point where the flange portion and the skirt portion are welded, toward the outer direction of the mask frame.