Abstract: A vaporizing type oil burner adaptable for use in forced flue type kerosene space heaters for household use and other heating equipment, including a fuel vaporization promoting plate made of a thin sheet of porous material and covering the entire area of the bottom of a vaporizer pot, an oil feeding device for feeding oil to the vaporizer pot which is capable of regulating the volume of oil fed to the pot, an oil diffusing device for control oil fed to the pot to the entire area of the fuel vaporization promoting plate, and a combustion air supply device. The fuel vaporization promoting plate is formed with a multitude of pores having surfaces functioning as surface means for vaporizing oil and receiving the heat of radiation generated by a flame, so that the time from initial combustion to steady state combustion following the starting of combustion can be shortened, the size of the burner can be greatly reduced, and incomplete combustion of the oil can be prevented when the burner is tilted.