To prevent a burner body from being erroneously set, in a gas cooking stove provided with a plurality of burners having approximately the same sizes as each other.

Burner bodies 3a and 4a of burners 3 and 4 approximately in the same size are assembled at a cooking stove body 2 but nozzles 3c and 4c fitted in air regulators 3b and 4b are differed in an outside diameter from each other and the inside diameters of the nozzle fit-in holes of the air regulators 3b and 4b are set to value suited for the outside diameters of the nozzles 3c and 4c. When one burner body 3a is erroneously set at the small diameter nozzle 4c side, since the nozzle fit-in hole of the other burner body 4a can not be fitted in the large nozzle 3c, it is detected that erroneous setting is made.