The present invention relates to a device for administering a medicinal liquid by injection, in particular a single dose of a medicinal liquid.The device comprises a dose assembly comprising collapsible reservoir, wherein the collapsible reservoir is adapted to hold the medicinal liquid to be administered, and an injection needle having a lumen, wherein at least a major part of the needle defines a longitudinal axis, and wherein to prior to injection the needle is located in the interior of the device and wherein a first end of the needle near to the collapsible reservoir is directly or indirectly mounted to the reservoir so that prior to actuation the lumen of the needle is in fluid communication with the interior chamber of the collapsible reservoir. The device further includes at least one actuator element onto which the user may apply a force to actuate the device, said force having a component along an axis perpendicular to the longitudinal axis； and a housing comprising a septum, wherein prior to injection, the dose assembly is disposed in the housing such that the collapsible reservoir and the needle are located in the interior of the housing and the septum blocks the lumen of the needle at a second end of the needle distant to the collapsible reservoir. The at least one actuator element is configured and arranged to act on at least a portion of the dose assembly and wherein the at least one actuator element and dose assembly are configured and arranged such that the needle is displaceable along said longitudinal axis and/or in an axis parallel to said longitudinal axis in response to an actuation force so that a portion of the needle moves from the interior to the exterior of the housing and device to allow for dispensation of the medicinal liquid. The septum is made of an elastomeric or rubber material having a Shore A hardness of 65 or less and 30 or more, said Shore A hardness being measured in according to DIN 53505.La présente invention concerne un disp
