Mallet finger is a common injury involving the extensor mechanism of the finger. It presents as an inability to extend the distal phalanx of the digit. In the right clinical setting, a thorough examination should be performed and supplemented by adequate radiographs. The mechanism of injury is usually a direct blow to an extended finger causing hyperflexion or hyperextension of the distal phalanx. Common occurrences are in young adults during sporting activities or in minor falls or trauma in osteoporotic individuals. Treatment includes use of a splint which maintains the distal phalanx in extension allowing for tendon healing or surgical intervention when indicated. In the vast majority of cases, prompt diagnosis and avid conservative treatment will result in a good outcome. Neglecting or missing this seemingly minor injury may result in a formidable functional handicap.