A modular system for stabilization the spinal column or other bones is provided by a first stabilization element (2) a second stabilization element (2, 5, 6, 7) to be connected to the first stabilization element (2) an outer connection element (4a,4b) to connect the first stabilization element to the second stabilization element wherein an end portion of the first stabilization element and an end portion of the second stabilization element each comprise a structure (23) engaging with a corresponding structure (44) provided in the outer connection element to establish a form-fit connection.