Abstract: A less lethal weapon projectile having an overall cylindrical shape and including a front end (4) shaped as an at least approximately spherical cap and a rear end (2) includes: a core (6) made from aluminium foam, having an overall cylindrical shape and including a front end (16) and a rear end (13) with a rear face (14), the front end (16) shaped as an at least substantially spherical cap; a base (5) assembled with the rear end (13) of the core (6) and including a front wall (9), arranged transversely and covering the rear face (14) of the core (6); and an outer case (7) covering at least the front end (16) of the core (6). The center of gravity and the center of thrust correspond perfectly, so that the projectile has good external ballistics.