A device for insertion in a tracheostoma which includes a cylindrical body having a longitudinal axis, a flexible flange which is provided on an outer surface of the device body and has unfolded configuration which it extends essentially from the outer surface of the body to the outside and has a folded configuration in which it is folded in the direction towards the longitudinal axis of the device body, as well as a pin-shaped insertion aid having a means for retaining the flange in its folded orientation, wherein the flange is formed by at least two wings each of which have a recess proximate a tip of the wing, in which the retaining means is removably introduced, and the wings have a shape memory that orients the wings, when unrestrained, away from the longitudinal axis of the device body.