To provide an oil scum treating method and oil scum treating device, incinerating oil scum advantageously in view of thermal energy.

In this oil scum treating method for incinerating oil scum with fuel oil, after the oil scum and fuel oil are finely mixed, immediately the oil scum is incinerated. This oil scum treating device includes: a fuel oil supply means; an oil scum supply means; a fuel oil and oil scum heating mans; and a mixing means for the oil scum and fuel oil.