Dynamic external fixator comprising a pair of rods (1) made of a radiolucent material, each rod (1) comprising a base (10), preferably with an opening (13), a stem (11) extending from the base (10), with a sliding groove (14) extending along a longitudinal axis of the stem (11) and stopping means (12, 2) between the base (10) and the stem (11) a pair of springs (3), each spring (3) being arranged on the stem (11) of one of the rods (1) and abutting against the stopping means (12, 2) proximal attachment means (K1) for attaching the base (10) of each rod (1) to a first position distal attachment means (K2) for attaching the stem (11) of each rod (1) to a second position, wherein the distal attachment means (K2) are inserted into the spirals of the spring (3) and through the sliding groove (14) of each of the rods (1), such that turning the spring (3) around the stem (11) allows adjusting a distraction force between the proximal attachment means (K1) and the distal attachment means (K2) and method for attaching such a dynamic external fixator.