Device for dispensing a fluid or pulverulent product, comprising a dispensing head (1) provided with a distribution outlet (10) formed at the end of a hollow sleeve (3), an air driver (20) to generate a flow of air as the device is actuated, said air driver comprising a piston (21) sliding in an air chamber (22) between a rest position and a dispensing position, said air chamber (22) comprising a cylindrical body in which said piston (21) slides in fluidtight manner, and a reservoir (30) containing a single dose of product, said reservoir (30) comprising an air intake (31) connected to said air driver (20) and a product outlet (32) connected to said distribution outlet (10), said air inlet (31) comprising a product retention member (40) for keeping the product in the reservoir (30) until such time as the product is dispensed, and said product outlet (32) being closed off by a closure element (50) forcibly fitted into the product outlet (32) of the reservoir (30), said device comprising a mechanical-opening system (61, 62) collaborating with said closure element (50) to expel it mechanically from its blanking-off position as the device is actuated, said device comprising an indicator (100； 50) which in the rest position prior to actuation is in a first state, and which after actuation switches to a second state, this switch from the first to the second state informing the user that the device has been actuated, said first state is a visible state and said second state is an invisible state, said device comprising a pushbutton element (25), secured to said piston (21), on which said user presses during actuation, said dispensing head (1) comprising a skirt (5) arranged around said air chamber (22), the lower axial edge of said skirt (5) comprising a cutout (6).Dispositif de distribution de produit fluide ou pulvérulent comportant une tête de distribution (1) pourvue d'une sortie de distribution (10) formée à l'extrémité d'un manchon creux (3), une chasse d'air (20) po
