Abstract: The invention relates to an osteosynthesis plate for the osteosynthesis of small neighbouring bones. The inventive osteosynthesis plate (1) is dimensioned such that it can be positioned above the bones to be treated without resting on the larger neighbouring bones. According to the invention, the osteosynthesis plate comprises lateral holes (16) for the insertion of screws (6) which are used to fix same to the bones (2 to 5). The plate is characterised in that: (i) it comprises a flat face (10) which is intended to come into contact with the bones to be treated; and (ii) it comprises holes (16) for receiving screws (6), which have axes that are inclined in relation to the aforementioned flat face (10) and which are designed such that the inserted screws diverge towards the outside of the plate (1).