The invention is an igniter gun equipped with a safety mechanism. The invention is characterized in that a lever is provided between a piezoelectric pusher and a trigger, with a first end of the lever pivotally connected to the casing, the second end and middle portion of the lever abutting against the trigger and the piezoelectric pusher respectively; one end of a gas controller is connected with a gas outlet valve, while another end of the gas controller forms a hook that abuts against the first end of the lever, a safety spring which urges the hook to go beyond a movement range of the first end of the lever is set between one side of the gas controller and a casing, a controller switch abutting against a back of the hook is set between another side of the gas controller and the casing, the controller switch is pivotally connected to the casing, and a portion of the controller switch exposed outside the casing.