Abstract: Inflammable cleaning fluid heating apparatus are disclosed. The disclosed apparatus safely heat a cleaning fluid such as an inflammable solvent to a predetermined temperature. One of the disclosed inflammable cleaning fluid heating apparatus includes a main body for storing a heat transfer oil; a heater mounted inside the main body for heating the heat transfer oil; a cleaning fluid path mounted inside the main body having an inlet and an outlet; a temperature sensor for sensing a temperature of the heat transfer oil; and a controller for selectively switching the heater between anon state and an off state.