The zygomatic bone is important for the midfacial contour and for protection of the orbital contents. Zygomatic fractures frequently occur. Because they are hidden behind a simple black eye in many instances, there is a potential risk of missing the diagnosis. Fresh zygomatic fractures are relatively easy to treat, but late secondary corrections are difficult and often have dissatisfying results. The most important clinical signs of a zygomatic fracture are: flattening of the zygomatic contour, edema, haematoma, unilateral nose-bleeding, disturbed sensibility, diplopia, restricted mandibular movements, contour defects. In this paper the clinical signs of a zygomatic fracture are emphasized to enable the general practitioner to examine the patient with a simple black eye appropriately and be able to recognize a zygomatic fracture.