The plug connector has a housing made of insulating material which includes an opening on one face for insertion of conductive contact pins and another opening on another face for insertion of the stripped ends of electrical conductors. There is a spring force terminal connection in each conductor connection area which pushes the stripped end of a conductor toward the contact pin insertion opening. The width (B1) of a passage for a contact pin is less than the width (B2) in the contact area adjacent to the contact pin insertion opening. The stripped end of the electrical conductor makes contact at a conductor contact section and can be moved against the spring force of an associated spring element.