Abstract: Applicator for inserting an object such as a tampon into a natural orifice of the human body, comprising the said object inserted in a tubular outer and a plunger intended to expel the said object such as a tampon from the tubular outer. The applicator comprises a flexible sleeve fixed concentrically to the outer, folded initially between the distal end of this outer and the object such as a tampon, the length of the deployed sleeve corresponding substantially to that of the object. The flexible sleeve deploys around the object such as a tampon when the latter leaves the outer under the effect of the plunger.