A dispenser assembly comprising a nasal fluid dispenser device having a reservoir forming body (10) containing fluid or that supports such a reservoir in stationary manner, a dispenser head (20) being assembled on said body (10), said dispenser head (20) being provided with a dispenser orifice (21), said assembly further comprising a positioner member (40) that co-operates with said nasal dispenser device, said positioner member (40) including at least a first facial bearing zone (42) that, during actuation, co-operates with the forehead or the bridge of the user's nose, said dispenser head (20) being movable axially relative to said body (10), said positioner member (40) including at least one hollow sleeve (41) in which said dispenser head (20) is inserted in clamping manner, said positioner member (40) including a second facial bearing zone (46) that is adapted to co-operate with the user's top lip.