Set of needle sheath extraction element for use in a medication delivery device, axially elongated in a proximal and a distal direction, comprising: - a cover (10) comprising second locking means (17) and means (18) for displacement, said cover being configured to be removably attached to a housing (32) of a medication delivery device, - a sheath grip element (20) comprising second stop means (24) and means (22) of engagement, said sheath gripping element being connected to said lid (10) and being configured to be able to engage a needle sheath (42) of a medicament container (46) placed inside said delivery device of medicaments, characterized in that said lid (10) and said sheath grip element (20) can move axially relative to each other and because said sheath grip element and said lid are configured p To interact with each other so that after removal of said cover from the housing, said sheath gripping element can be engaged to and removing said needle sheath and because said lid can move coaxially in relation to the sheath gripping element, in which the movement of the sheath grip element is restricted by the interaction between the means (18) of movement and the means (22) of engagement so that the grip element is displaced to engage the sheath (42) and in which the movement of the lid in relation to the sheath grip element is restricted by the interaction between the second locking means (17) and the second stop means (24) so that the lid, the grip element and the sheath can be removed from the device.Conjunto de elemento de extracción de vaina de aguja para su uso en un dispositivo de administración de medicamentos, alargado axialmente en una dirección proximal y una distal, que comprende: - una tapa (10) que comprende segundos medios (17) de bloqueo y medios (18) de desplazamiento, estando dicha tapa configurada para unirse de manera extraíble a un alojamiento (32) de un dispositivo de administración de medicamentos, - un elemento (20) de agarre de vaina que
