Abstract: A flash steam generator to be used as an integral component of a steam sterilizer. The generator is constructed of a metal block having a first bore drilled lengthwise through the metal block. Surrounding the first bore are a plurality of additional heater bores in which heating elements are inserted. The generator is integral to the sterilizer piping and control systems. Water is supplied to the first bore by the sterilizer piping system, and electricity is supplied to the heating elements by the sterilizer power supply. The heating elements convert the electricity to heat, which transfers via the metal block to the first bore where the heat rapidly boils the water contained therein in what is essentially a flash vaporization process.