PURPOSE: To prevent the burning condition with kerosene denatured after the long term of storage from being deteriorated and decrease the production of sticky matter by a method wherein a magnet for purification of the denatured kerosene is provided in the middle of an oil flow passage in the kerosene combustion equipment such as kerosene stove or the like.

CONSTITUTION: On the upper surface of one side of a fixed tank is formed an oil charge port 4, to which a cartridge tank 7 is removably provided. A permeable plate 7 and a filter 8 are arranged at the lower surface side of the oil charge port 4. At the other side of the fixed tank 1, there is provided a combustion tube 15 consisting of a wick guide tube 12, an ignition wick 14, a red heating net 15a and the like. In the middle of the oil flow passage 16 from the cartridge tank 9 to the combustion part, there is formed a swelled-out part 17, in which a magnet 18 is held. Due to the existence of the magnet, the deteriorated kerosene is purified and consequently the production of sticky matter is suppressed.