Medical delivery device (1; 10), comprising a rod element (3; 30) having a stem (31; 310) with a longitudinal axis (38; 380), a first thread arrangement (34, 35; 3320, 3330), a distal end and a proximal end, a dosage member (6; 60) comprising a delivery orifice (62; 620) and a chamber body (61; 610) with a distal end, a proximal end and a hollow interior, wherein the stem (31; 310) of the rod element (3; 30) extends into the interior of the chamber body (61; 610) of the dosage member (6; 60) and the delivery orifice (62; 620) is arranged adjacent to the proximal end of the stem (31; 310) of the rod element (3; 30), wherein, in a dosing status of the medical delivery device (1; 10), the rod element (3; 30) is movable along its longitudinal axis (38; 380) relative to the delivery orifice (62; 620) of the dosage member (6; 60) by the first thread arrangement (34, 35; 3320, 3330) of the stem (31; 310) of the rod element (3; 30) and a second thread arrangement (65; 650) travelling along each other, wherein a dosage chamber (611; 6110) is formed in the interior of the chamber body (61; 610) of the dosage member (6; 60) between the stem (31; 310) of the rod element (3; 30) and the delivery orifice (62; 620) which dosage chamber (611; 6110) increases when the rod element (3; 30) moves away from the delivery orifice (62; 620), characterized by comprising a switching mechanism (4, 34, 35; 40, 330, 510) for changing the medical delivery device (1; 10) from the dosing status to a delivery status, wherein, in the dosing status of the medical delivery device (1; 10), moving the rod element (3; 30) along its longitudinal axis (38; 380) by applying an axial force to the rod element (3; 30) is prevented, and, in the delivery status of the medical delivery device (1; 10), the rod element (3; 30) is movable along its longitudinal axis (38; 380) relative to the delivery orifice (62; 620) by applying an axial force to the rod element (3; 30), and moving the rod element (3; 30) along its longitudinal axis (38; 380) by travelling the first thread arrangement (34, 35; 3320, 3330) of the stem (31; 310) of the rod element (3; 30) and a second thread arrangement (65; 650) along each other is prevented. a rod element (3; 30) having a stem (31; 310) with a longitudinal axis (38; 380), a first thread arrangement (34, 35; 3320, 3330), a distal end and a proximal end, a dosage member (6; 60) comprising a delivery orifice (62; 620) and a chamber body (61; 610) with a distal end, a proximal end and a hollow interior, wherein the stem (31; 310) of the rod element (3; 30) extends into the interior of the chamber body (61; 610) of the dosage member (6; 60) and the delivery orifice (62; 620) is arranged adjacent to the proximal end of the stem (31; 310) of the rod element (3; 30), wherein, in a dosing status of the medical delivery device (1; 10), the rod element (3; 30) is movable along its longitudinal axis (38; 380) relative to the delivery orifice (62; 620) of the dosage member (6; 60) by the first thread arrangement (34, 35; 3320, 3330) of the stem (31; 310) of the rod element (3; 30) and a second thread arrangement (65; 650) travelling along each other, wherein a dosage chamber (611; 6110) is formed in the interior of the chamber body (61; 610) of the dosage member (6; 60) between the stem (31; 310) of the rod element (3; 30) and the delivery orifice (62; 620) which dosage chamber (611; 6110) increases when the rod element (3; 30) moves away from the delivery orifice (62; 620), characterized by comprising a switching mechanism (4, 34, 35; 40, 330, 510) for changing the medical delivery device (1; 10) from the dosing status to a delivery status, wherein, in the dosing status of the medical delivery device (1; 10), moving the rod element (3; 30) along its longitudinal axis (38; 380) by applying an axial force to the rod element (3; 30) is prevented, and, in the delivery status of the medical delivery device (1; 10), the rod element (3; 30) is movable along its longitudinal axis (38; 380) relative to the delivery orifice (62; 620) by applying an axial force to the rod element (3; 30), and moving the rod element (3; 30) along its longitudinal axis (38; 380) by travelling the first thread arrangement (34, 35; 3320, 3330) of the stem (31; 310) of the rod element (3; 30) and a second thread arrangement (65; 650) along each other is prevented.