 the first pair of protruding portions of the another of the first pair of magnetic pieces are displaced outwardly from the one of the second pairs of protruding portions of the another of the second pair of magnetic pieces in a direction perpendicular to the in-line direction, the first pair of protruding portions of the another of the first pair of magnetic pieces and the one of the second pairs of protruding portions of the another of the second pair of magnetic pieces opposing each other, respectively. In accordance with another embodiment of the present invention, there is provided a color cathode ray tube including a vacuum envelope comprising a panel portion, a neck portion, and a funnel portion connecting the panel portion and the neck portion; a phosphor screen on an inner surface of the panel portion; a shadow mask suspended closely spaced from the phosphor screen in the panel portion; an electron gun comprising a plurality of electrodes for generating and focusing three in-line electron beams and housed within the neck portion; a deflection device mounted around a transition area between the funnel portion and the neck portion for deflecting the three in-line electron beams in horizontal and vertical directions; and a convergence correction device comprising a plurality of magnetic pieces positioned on opposite sides of each of the three in-line electron beams in an in-line direction of the three inline electron beams and disposed on a phosphor screen side of the electron gun; the plurality of magnetic pieces including a first pair of magnetic pieces positioned on a neck wall side of each of side electron beams of the three in-line electron beams in the in-line direction and a second pair of magnetic pieces positioned on opposite sides of a center electron beam of the three in-line electron beams i