The invention relates to an orthopedic support device for supporting, protecting and immobilizing part of a hand, and particularly, but not exclusively, to a 5th metacarpal fracture splint. The device comprises a preformed support member (1) which, in use, extends along the wearer's wrist and hand and is attachable thereto, so as to provide support with the hand disposed in one direction so that the wrist joint is at a given angle, and the fingers disposed in another direction so that the knuckles are at an angle substantially similar in magnitude but opposite in orientation to the wrist joint and not exceeding 55.degree..