Fluid product dispenser comprising: a reservoir of fluid product (12) defining a actuating wall (21; 76′) able to be moved, a distribution orifice (41; 231; 755), and spring means (7; 7′; 7″; 7″′) adapted to act on the actuating wall to produce a state of maximum volume of the reservoir, characterised in that the spring means (7; 7′; 7″; 7″′) co-operate with the arming means (11; 73; 753; 763) able to bring the spring means to bias the actuating wall starting from an initial state in which the spring means do not bias the actuating wall.