Safety gas burner

A safety gas burner comprising:

• a shell, said shell comprising front extension tube forwardly extended from a front end thereof, a metal flame tube mounted in said front extension tube, a butane well, a gas valve adapted to control output of fuel gas from said butane well, a gas lever pivoted to said gas valve and adapted to open said gas valve for output of fuel gas from said butane well;
• an igniter mounted in said shell, said igniter having a first terminal connected to said flame tube by a conductor an a second terminal connected to a spark discharging electrode suspended in same flame tube;
• an ignition switch button mounted in a through hole of said shell and stopped against said igniter for depressing by hand to trigger said igniter and to drive said gas lever to open said gas valve;
• a safety button supported on a spring in a locating hole of said shell and adapted to let said gas lever be driven by said ignition switch button when depressed, said safety button having a mushroom-like cap disposed outside said shell;
• and
• a spring-supported stop member mounted in a sliding slot of said shell and stopped between an outside wall of said shell and the cap of said safety button to stop said safety button from operation.