This invention relates to a hinge device which is adapted to provide pivotal connection between parts of casings, particularly for portable computing devices. The hinge device consists of an outer housing member and an inner shaft. Non-metallic frictional material is disposed about the shaft. The frictional material is rotatable within the housing member. Lateral surfaces of the shaft are either distanced from inner surfaces of housing member or are separated by the frictional material. The housing member and shaft are connected to different parts of a casing such that rotation of the shaft within the housing member causes pivotal motion between the parts. The parts can be releasably fastened in selected pivotal orientations due to friction generated between the frictional material and the inner surfaces of the housing member. The invention also relates to a computing device incorporating such a hinge device.