The present invention relates to an osteosynthesis clip (1) in the overall shape of a U, comprising: two anchor bars (2, 3) and a connecting bar (4), comprising a longitudinal opening (5) able to adopt a closed configuration and an open configuration, characterized in that said clip comprises a compression piece (20) the cross-sectional shape of which is oval overall, housed within said opening, said piece being able to be rotated in said opening, thus causing said opening to pass from its closed configuration into at least one said open configuration, and vice versa.
