To provide an electron gun manufacturing method for manufacturing an electron gun having a comparatively uniform scattered forest of needle-like projections of a nano-order structure as gun shafts to emit electrons, reliably obtaining such a fine structure, and manufacturing it inexpensively and also provide an electron gun manufactured by this method.

In the method for manufacturing the electron gun wherein needle-like projections as gun shafts to emit electrons are scattered on an array base at approximately equal intervals, a porous positive electrode oxide film is formed on one surface of a laminated aluminum metal material. Numerous microholes in a barrier layer at the bottom of the porous positive electrode oxide film are used as a die to form needle-like projections. A raw material for the needle like projections is filled in the microholes to form the needle like projections.