A disposable intramedullary device for temporary use for treatment of limb infections comprising a variable cross-sectional solid core (1), including a distal portion (2), a middle portion (3) and a proximal portion (4), said proximal portion (2) and distal portion (4) including anchoring regions (5) consisting of through-holes (6) for passing anchoring means to the bone. Outside said anchoring regions (5) said solid core (1) is coated with a polymer layer (7) including antibiotic, the outer diameter of the core (1) and layer (7) assembly being equivalent to that of an intramedullary channel, and the outer diameter of said solid core (1) in said anchoring regions (5) is equivalent to that of an intramedullary channel.