A strapping machine for securing at least one strap around a package has a binding head engageable against the package, a cincher, and a welder for connecting ends of the tightened strap. The welder has at least one upper advanceable welding electrode in an electrode housing and a counter electrode temporarily interacting therewith. A slide plate movable toward the package, forms the counter electrode, engages underneath overlapping ends of the strapping and directly on the package, and has a projecting tongue spaced from the welding electrode and a plate end part connected to a positioning mechanism.