Abstract: An ice-hockey helmet includes a front part and a back part which are hinged together and which, to enable the size of the helmet to be altered, are arranged to be swung to and locked in different positions relative to one another. The front part forms the major part of the helmet and is provided with ear guards having chin strap attaching means, while the back part has the form of a basin-shaped neck guard. The neck guard can be swung as a flap, relative to the front part of the helmet, about a substantially horizontal hinge means. To enable the helmet to be altered precisely to selected sizes, the front and back parts of the helmet are provided with mutually co-acting portions which when the back part of the helmet is swung relative to the front part thereof, so as to shorten the helmet, cause the helmet to be drawn together, so as to reduce the width thereof.