System for connecting profile elements includes a separate clamping element having a clamping plate and at least one protrusion and a separate locking element having a base plate and at least one protrusion. In an assembled state, the locking element butts against that side of the profile elements located opposite the clamping element, such that protrusions of the locking element and of the clamping element are directed toward one another. A device is utilizes to clamp the clamping element and the locking element together such that, in the assembled state, the profile elements are clamped in between the clamping element and the locking element. The device being guided centrally between the profile elements.