A fluid sample device comprising at least two superposed sheets (1, 2) that are connected together by a retaining element (3), each of the sheets including an inside face (1a, 2a), the inside faces (1a, 2a) facing each other in such a manner as to come into contact, the inside face (1a) of at least one sheet (1) including a zone (4) that is provided with microcapsules (4, 4′) containing a fluid, the sample device being characterized in that the inside faces (1a, 2a) slide relative to each other with friction between a masked position and an exposed position of the zone (4) of microcapsules, being connected by the retaining element (3), in such a manner as to break the microcapsules and release the fluid contained therein progressively.
