Abstract: The disclosure relates to a device for locking two interconnected floor panels that are identically embodied and includes a core, an upper side and a lower side, and a first lateral edge (I) and a second lateral edge (II) opposite the first lateral edge. On the upper side, the first lateral edge (I) of the first floor panel abuts against the second lateral edge (II) of the second floor panel. A horizontal groove extending into the core is embodied in the second lateral edge (II), with an upper wall, an inner wall and a lower wall, the lower wall being formed from a lower lip projecting on the first lateral edge (I), which, on the outer end thereof, has a projection that is oriented towards the upper side and has a first locking edge, and at least one locking element is inserted in the region of the connection point of the two floor panels.