An electrical connecting device for inserting a male plug connector of an electronic component, consisting of a strip of electrically conductive material having a central portion with an opening for introducing the male plug connector and, symmetrically on both sides of the central portion, two longitudinal portions each having an intermediate insertion section in which a contact blade is formed which is delimited by a cut-out, and a terminal section for being plugged into a support. The strip of material is folded to form a parallelepiped cage delimited by the central portion and by the two intermediate insertion sections formed so that their contact blades each define a contact area for a male plug connector introduced into the cage, and a section which may be plugged into a support consisting of two terminal sections placed against one another.