Dislocation and subluxation of proximal interphalangeal joint of a finger are relatively common and reduction by closed method is normally easily achieved. However anterior dislocation of a proximal interphalangeal joint is an uncommon injury that produces permanent joint stiffness unlike the more common radial, ulnar, and dorsal dislocations. The case reported here is irreducible due to the displacement of the intact lateral band and interposition of the central slip between the joint.