Reminder device for a pen-shaped medical delivery device, the medical delivery device comprising a drive mechanism for dispensing the set dose of the medicament in a distal direction, the reminder device comprising: ▪ a housing part being part of the housing of a medical delivery device, the housing part comprising a guiding device, ▪ an adjusting element which is movably disposed on the guiding device for the selection of a position of the adjusting element for indication of a time information, ▪ an indication device disposed along the guiding device and having an outer surface with sequential indicia or time indicia disposed thereon, wherein the indication device provides a time indication which corresponds to the position of the adjusting element, wherein the reminder device is arranged such that the position of the adjusting element can be selected by the user independently of the delivery operation of the medical delivery device, wherein the guiding device is formed as a guide track on which the adjusting element is movably disposed in an axial direction, characterized in that - the reminder device comprises a cage disposed on the guide track such that it is movable in the axial direction, in that the adjusting element is positioned in the cage and movable with regard to the cage in a radial direction and wherein a biasing means is positioned between an inner surface of the cage arid the adjusting element, or - wherein the reminder device comprises an engaging device for engaging a selected position of the adjusting element (5, 50), wherein the engaging device comprises a first engaging means disposed on the adjusting element and a second engaging means disposed on the housing part, and in that the adjusting element is rotatable relative to the second engaging means between an engaged and a disengaged position. ▪ a housing part being part of the housing of a medical delivery device, the housing part comprising a guiding device, ▪ an adjusting element which is movably disposed on the guiding device for the selection of a position of the adjusting element for indication of a time information, ▪ an indication device disposed along the guiding device and having an outer surface with sequential indicia or time indicia disposed thereon, wherein the indication device provides a time indication which corresponds to the position of the adjusting element, wherein the reminder device is arranged such that the position of the adjusting element can be selected by the user independently of the delivery operation of the medical delivery device, wherein the guiding device is formed as a guide track on which the adjusting element is movably disposed in an axial direction, characterized in that - the reminder device comprises a cage disposed on the guide track such that it is movable in the axial direction, in that the adjusting element is positioned in the cage and movable with regard to the cage in a radial direction and wherein a biasing means is positioned between an inner surface of the cage arid the adjusting element, or - wherein the reminder device comprises an engaging device for engaging a selected position of the adjusting element (5, 50), wherein the engaging device comprises a first engaging means disposed on the adjusting element and a second engaging means disposed on the housing part, and in that the adjusting element is rotatable relative to the second engaging means between an engaged and a disengaged position. - the reminder device comprises a cage disposed on the guide track such that it is movable in the axial direction, in that the adjusting element is positioned in the cage and movable with regard to the cage in a radial direction and wherein a biasing means is positioned between an inner surface of the cage arid the adjusting element, or - wherein the reminder device comprises an engaging device for engaging a selected position of the adjusting element (5, 50), wherein the engaging device comprises a first engaging means disposed on the adjusting element and a second engaging means disposed on the housing part, and in that the adjusting element is rotatable relative to the second engaging means between an engaged and a disengaged position.