An electrode arrangement for a welding clamp arrangement having a first electrode with an electrode shaft extending along an electrode axis, and an electrode tip, and a power supply unit, wherein the power supply unit has a contact bridge and a contact rod extending along a rod axis and having a contact surface. The contact bridge has a contact opening, in which the contact rod is mounted in an axially displaceable manner in a direction of its rod axis, and in an electrically conductive manner, and the contact bridge has a contact region, which is connected to the first electrode in a mechanically fixed and electrically conductive manner.