The invention relates to a gas cooker (1) comprising a gas burner (2) and an infrared sensor device (5) for ascertaining a temperature of a cooking receptacle (6) associated with the gas cooker (1). The bas burner (2) has a burner base (3), a burner cover (4) and a plurality of gas outlet ports (19). The gas outlet ports are located along a closed curve (28). The infrared sensor device (5) is offset in a radially outward direction in relation to the closed curve (28). The infrared sensor device (5) at least partially penetrates the burner base (3) and the burner cover (4).