Abstract: An evaporation apparatus for solvent fuel comprises an evaporation tank containing the solvent fuel. A blower is installed on the top of the tank with its one end connected to an air inlet pipe, which has a blower switch associated with a check valve. The air inlet pipe is deeply extended to the bottom of the tank for introducing the air into the tank so as to evaporate the solvent fuel. The other end of the blower is connected to a pressure switch for controlling operation of the blower by detecting inner pressure of the tank. A constant temperature rod is provided nearby the bottom of the tank with its one end in connection with a temperature control switch to maintain the tank at a constant temperature. Besides, a scale graduation tube is provided for measuring the fuel quantity.