A cooking device is provided. The cooking device includes a burner body having a nozzle to supply a gas, a burner head provided above the burner body, and having a mixed gas chamber in which air and the gas injected from the nozzle are introduced. a burner cap provided on the burner head, a flame remaining chamber provided at the burner head and separated from the mixed gas chamber, and a flame detection unit to pass through the burner head and located at the flame remaining chamber.