Clavicle fractures complicated by pneumothorax are rare. This case report describes a young man who developed pneumothorax secondary to an isolated clavicle fracture following blunt trauma to his right shoulder in an assault. The pneumothorax was diagnosed on a shoulder X‐ray, and required the insertion of a chest drain. It may be prudent to specifically exclude a pneumothorax in clavicle fractures if the fractured segment is directed towards the lung.