The invention relates to an electrical connecting device for inserting a male plug connector of an electronic component such as a fuse or relay, consisting of a strip of electrically conductive material having a central portion (3) in which an opening (6) is made for introducing the male plug connector and, symmetrically on both sides of said central portion, two longitudinal portions (4, 5) each comprising an intermediate insertion section (9) in which a contact blade (10) is formed which is delimited by a cut-out (11-13), and a terminal section (24, 25) for being plugged into a support. Furthermore, this strip of material is folded so as to form, on the one hand, a parallelepiped cage delimited by the central portion (3) and by the two intermediate insertion sections (9) formed so that their contact blades (10) each comprise a contact area for a male plug connector introduced into the cage and, on the other hand, a section which may be plugged into a support consisting of two terminal sections (24, 25) placed against one another.