The present invention relates to a device (1； 1'； 21； 61； 81) for the cerclage of fractured bone as well as to a cerclage system using such device. The cerclage device according to the invention comprises a cerclage wire or thread (3) and at least one spacer (5； 5'； 25； 65； 85) arranged on said cerclage wire or thread (3). According to the invention, said at least one spacer is made as a band having a substantially rectangular plan and a concave profile. Owing to said concave profile, the band can adapt to the surface of the fractured bone； in addition, the force exerted on the bone by the cerclage wire is advantageously distributed over the entire surface of the band. Said cerclage device further comprises at least one safety thread (13) which allows preventing the spacer from becoming lost in the patient's body in case the cerclage wire or thread tears off.
