Abstract: A sterilization apparatus for sterilizing medical instruments such as scalpels, tweezers, needles and the like utilizes an electrically heated inert material as the sterilizing media. Instruments to be sterilized are positioned in the inert material and become aseptic within 10 to 30 seconds. The sterilization apparatus includes a cylindrical metal tube which can be electrically heated in a short time to a high temperature (200.degree.-300.degree. C.). The sterilization apparatus also includes insulation surrounding the heated cylindrical metal tube and an insulated base. This insulation ensures that heat is conducted to the inside of the tube and is isolated from other parts of the apparatus, particularly, the electronic components. With this insulation, a compact sterilization apparatus can be made without damage to the apparatus components due to excessive heat.