Abstract: An illuminating projectile which can be launched from a rifled-tube unit.The projectile includes on the one hand an illuminating flare which can be disconnected from the body of the projectile after a predetermined period of time under the action of an ejection charge, and on the other hand at least one parachute for braking translation of the illuminating flare, and floating fins acting on the illuminating flare itself to reduce the speed of rotation of the illuminating flare. The floating fins are connected to the illuminating flare by filiform connecting elements, one of the ends of which is attached to the illuminating flare while the other end is free and provided with a stop, the fins being mounted for free rotation and translation around and along a connecting element.