s of the effective surface or the non-aperture portion is recessed from any other adjacent part, in a direction to leave from the phosphor screen along the tubular axis. Further, according to the color cathode-ray tube relating to the present invention, the effective surface, or the effective surface and the non-aperture portion of the mask main body are formed in a curved surface having a radius of curvature in the short axis direction, and at each long side of the mask main body, at least 