Abstract: A device for introducing a needle for injecting a liquid substance, wherein the device includes a housing, a rear longitudinal part forming a portion of the housing and including a piercing needle, the rear longitudinal part being connectable to an injection device separate from the housing, a front longitudinal part forming another portion of the housing and including an injection needle for delivering said liquid, and a flexible connection between the piercing needle and the injection needle.

Abstract: The present invention relates to a method for controlling the introduction depth of an injection needle 1 which is mounted inside a needle introduction device 17, 18 so as to be capable of axial displacement relative to an injection device 12 coupled to said needle introduction device or arranged in the same. The maximum possible run of the injection needle is set to a value H and can be shortened using a cylindrical hollow spacing member 21 which can be concentrically mounted about said injection needle 1. Since the maximum possible run H of the injection needle can be shortened using the spacing member 21, it is thus possible to obtain a penetration depth of variably range. To this end, it is possible to use a series of spacing members 21 having different axial lengths x or a spacing member which can be screwed in a front position.