A fluid dispenser device including at least one individual reservoir containing a single dose of fluid, such as powder, opening means (80) being provided for opening an individual reservoir each time the device is actuated, said device including movable support means (50) that are adapted to move an individual reservoir against said opening means (80) on each actuation, said movable support means (50) being displaceable between a non-dispensing position and a dispensing position, said movable support means (50) being urged towards their dispensing position by resilient means (70), such as a spring, and being held in their non-dispensing position by blocking means that are released by the user inhaling, said device including a cocking member (800) that co-operates with said resilient means (70) and with a cam surface (51) that is formed on said movable support means (50), said cam surface (51) comprising at least one loader portion (511; 511′) for loading said resilient means (70), at least one end portion (515; 515′) for blocking said cocking member (800) in said open position and/or in said closed position of a cover element (11, 12), and at least one safety portion (513; 513′) for interconnecting at least one loader portion (511; 511′) with at least one end portion (515; 515′), said cocking member being displaceable over said safety portion (513; 513′) without additional compression or decompression of said resilient means (70).