Abstract: A trigger mechanism for electrically ignited weapons having a source of electric energy. Leads are provided which connect the source of energy with the electrical ignition means for a propelling charge contained in the weapon, and a normally open switch is interposed in one of said leads, which switch can be closed for igniting the ignition means by pulling the trigger. The source of energy comprises a piezoelectric body and a capacitor connected in parallel with the piezoelectric body, the trigger being coupled with a striker which is tripped from a tensioned position when the trigger is pulled and released for striking the piezoelectric body before the switch closes.