A color cathode-ray tube comprising a perforated molded mask (6) curved inward in the middle between its two opposite sides and having round corners, and a support frame (7) curved outward in the middle between its two opposite sides and having round corners, wherein the corners of the mask (6) are respectively brought into contact with the corners of the frame (7). The frame (7) has a stud on each side and it is located inside the straight line connecting the adjacent points of contact between the corners of the mask (6) and the frame (7). Therefore, the alignment accuracy between a shadow mask structure (5) and phosphor film and the magnetic shielding of the color cathode-ray tube can be improved.
