To provide a cookstove capable of accurately and quickly detecting whether flames are correctly formed by a burner for heating a heated object or not while keeping good cleaning performance and appearance.

This cookstove comprising the burner 30 for heating the heated object N and a flame detecting means 21 for detecting the flames F formed by the burner 30, further comprises an infrared ray intensity measuring means 40 for measuring the intensity of infrared ray radiated from the flames F formed by the burner 30, and the flame detecting means 21 is constituted to detect the flames on the basis of the intensity of the infrared ray measured by the infrared ray intensity measuring means 40.