To provide a combustion apparatus that has a vaporizer capable of vaporizing liquid fuel completely without complicating the structure of the combustion apparatus. The combustion apparatus has an evaporating part 6 for heating and vaporizing the liquid fuel into combustion gas, and a premixed gas spout part 11 for spouting out premixed gas in which the combustion gas is mixed with primary air, with an inflow port 12 of the premixed gas spout part 11 being arranged at a position higher than the evaporating part 6. By configuring the combustion apparatus like this, a space for accumulating unvaporized liquid fuel is formed between the evaporating part 6 and the inflow port 12, and sufficient time to completely vaporize the liquid fuel can be afforded. Therefore, unevaporated fuel in a liquid state can be prevented from flowing into the premixed gas spout part 11.