Focusing electrode in an electron gun for a color cathode ray tube, which can provides a higher freedom in an electron gun design and reduce an error occurred during assembly of the electron gun, the focusing electrode including a first focusing electrode for being applied of a constant voltage, the first focusing electrode having vertically elongated electron beam pass-through holes formed therein, and a second focusing electrode for being applied of a dynamic voltage, the second focusing electrode having electron beam pass-through holes each with a pair of burring parts formed on upper and lower edges thereof for being disposed in each of the vertically elongated electron beam pass-through holes in the first focusing electrode, whereby the pair of burring parts can be disposed in each of the vertically eleongated electron beam pass-through holes in the first focusing electrode without change of a horizontal diameter of the electron beam pass-through holes in the first focusing electrode.