Abstract: A combustion apparatus is provided. The combustion apparatus includes a fuel reservoir storing fuel therein, and a main body connected to the fuel reservoir by a flexible tube. The main body receives fuel from the fuel reservoir and combusts the fuel therein. The main body is partitioned into an upper space and a lower space by a partition plate. The main body includes a combustor that is provided in the upper space and combusts fuel supplied from the fuel reservoir, a blower that is provided in the lower space to supply air to the combustor, and a heating unit that is removably coupled to the combustor and completely combusts air incompletely combusted in the combustor. The combustion apparatus completely combusts liquefied animal and vegetable oil, thus reducing a tar generation rate.