Abstract: A cathode ray tube includes a plurality of electrode layers which are separately formed in the advancing direction of electron beam, and form a plurality of electrostatic lenses along with corresponding electrodes of an electron gun upon applying voltages of differing potentials. The cathode ray tube has an accelerating electrode layer as an accelerating electrode which forms a main lens with a focusing electrode of the electron gun, and an electrode layer as a prefocusing electrode which forms a prefocusing lens with the focusing electrode and other electrodes, so that the electron beam is accelerated and focused by the electrode layer formed on the inner surface of a neck. The image quality realized on the screen can be improved, while reducing the length of the neck.