To provide a combustion apparatus capable of keeping safety even if a gas leakage occurs from a gas shutoff valve to the outside of a gas supply passage. The combustion apparatus comprises a gas supply passage (1) for supplying an inflammable gas, a burner body (4) for burning the inflammable gas supplied from the gas supply passage (1), a casing (8) so installed as to cover the burner body (4), and a gas shutoff valve (2) installed in the gas supply passage (1) on the upstream side of the burner body (4) and disposed on the outside of the casing (8). The burner body (4) is spatially separated from the gas shutoff valve (2).