(57) The disclosure relates to an impact igniter for projectiles rotating in their trajectory, the igniter being secured against unintentional initiation prior to firing of the projectile in that the detonating cap (15), initiated by the firing pin (4) on a hit in the target, is disposed in a bore in a rotor (14) that is asymmetric in terms of weight rotatably disposed in relation to the main portion of the igniter (1), the rotor being secured in a position obliquely inclined in relation to the longitudinal axis of the projectile and a firing pin disposed in the same direction, in which position the rotor is blocked by means of specific safety functions characteristic of the present invention, these functions including a pin (13) fixedly connected to the rotor and projecting therefrom.