A device is described, for the connection, both mechanical and electrical, of a terminal of electric and/or electronic components. The device has a contact element which is permanently elastic, made of a foil of electrically conductive material, said contact element including an insertion zone for the terminal defined by two opposite hemisurfaces, and a flexion slot of the two hemisurfaces, contiguous to the contact zone, for allowing the insertion of the terminal in a stressed condition of the hemisurfaces within the limits of elasticity of the material constituting the foil.