An inhalation-synchronized fluid dispenser device having a body; a mouthpiece; a reservoir; a valve; a blocking element; a trigger element; and an inhalation-controlled trigger system including an inhalation-sensitive member deformable or movable so that when the inhalation-sensitive member is deformed and/or moved, it moves and/or deforms the trigger element towards its release position, thereby making it possible to move and/or deform the blocking element towards its actuation position. The device has a ring that co-operates with the blocking element, such that in the blocking position, an axial projection of the ring co-operates with an axial blocking extension so as to block the reservoir, and in the actuation position, the axial projection co-operates with an axial recess, thereby enabling the reservoir to move axially.