The invention refers to a finger guard for an injection device (1) with a hollow injection needle (4) arranged to be hidden inside a component (2) with an orifice (46) prior to use and to be advanced relative to the component (2) through the orifice (46) for inserting it into an injection site, the finger guard comprising a spring wire (48) attached to the component (2) and comprising an arcuate transversal section (48.1) biased in a manner to flex inwards so as to essentially obstruct the orifice (46) for finger access when released but staying enough off-centre to allow the needle (4) to advance through the orifice (46) without touching the spring wire (48).