DRUG DELIVERY DEVICE

The invention provides a drug delivery device for dispensing of a dose of a medicinal product, comprising: a housing having a proximal end and a distal end, a container comprising the medicinal product, a piston being retained in the container, a push-pull element, wherein the push-pull element is displaceable in proximal direction for setting of a dose and wherein the push-pull element is displaceable in distal direction for dispensing of a dose, a piston rod being coupled with the housing and having a distal end to interact with the container's piston, the piston rod being further coupled with the push-pull element, coupling elements for converting a proximal displacement of the push-pull element into a rotational movement of the piston rod and for converting a distal displacement of the push-pull element into an axial movement of the piston rod with respect to the housing.