A dislocation of the sternomanubrial joint is a rare injury with varied treatment methods including both nonoperative and operative described methods. There is a paucity of literature regarding the optimal method of treatment as well as a lack of consensus on the best surgical construct. This case demonstrates the successful use of dual locking plate fixation for an acute type II sternomanubrial dislocation in a 22-year-old man. In principle, locking plate fixation affords greater unicortical fixation than traditional nonlocking fixation, and allows for minimising the risk of damage to pulmonary tree structures. The patient achieved good pain relief and regained physical function.