An inhalation-synchronized fluid dispenser device comprising a body (10; 10') provided with a mouthpiece, a fluid reservoir containing a fluid and a propellant gas being mounted to slide axially relative to said body (10; 10'), a metering valve including a valve member being assembled on said reservoir for selectively dispensing the fluid, said device further comprising: • a blocking element that is movable and/or deformable between a blocking position, in which said metering valve cannot be actuated, and an actuation position, in which said metering valve can be actuated, • a trigger element that is movable and/or deformable between a locking position, in which it blocks said blocking element in its blocking position, and a release position, in which it does not block said blocking element, and • an inhalation-controlled trigger system including an inhalation-sensitive member (60, 61), deformable and/or movable under the effect of inhaling, said inhalation-sensitive member (60, 61) co-operating with said trigger element, so that when said inhalation-sensitive member (60, 61) deforms and/or moves, it moves and/or deforms said trigger element towards its release position, thereby making it possible the moving and/or the deformation of said blocking element from its blocking position towards its actuation position, Said blocking element including a projection that, in the locking position of the trigger element, cooperates with a locking shoulder of said trigger element to define a latch preventing the moving and/or deformation of said lock element out of its locking position, said latch forming, in locking position of the trigger element, a first contact point between said blocking element and said trigger element, characterized in that said blocking element includes a lateral projection that, in the locking position of the trigger element, cooperates with a bearing surface of said trigger element to form, in the locking position of the trigger element, a second contact point between said blocking element and said trigger element. • a blocking element that is movable and/or deformable between a blocking position, in which said metering valve cannot be actuated, and an actuation position, in which said metering valve can be actuated, • a trigger element that is movable and/or deformable between a locking position, in which it blocks said blocking element in its blocking position, and a release position, in which it does not block said blocking element, and • an inhalation-controlled trigger system including an inhalation-sensitive member (60, 61), deformable and/or movable under the effect of inhaling, said inhalation-sensitive member (60, 61) co-operating with said trigger element, so that when said inhalation-sensitive member (60, 61) deforms and/or moves, it moves and/or deforms said trigger element towards its release position, thereby making it possible the moving and/or the deformation of said blocking element from its blocking position towards its actuation position, Said blocking element including a projection that, in the locking position of the trigger element, cooperates with a locking shoulder of said trigger element to define a latch preventing the moving and/or deformation of said lock element out of its locking position, said latch forming, in locking position of the trigger element, a first contact point between said blocking element and said trigger element, characterized in that said blocking element includes a lateral projection that, in the locking position of the trigger element, cooperates with a bearing surface of said trigger element to form, in the locking position of the trigger element, a second contact point between said blocking element and said trigger element.