Abstract: A hinge component for an electronic device includes a fixing member, a rotating member and a central shaft. The fixing member includes a side plate and two fixing plates, a curved guiding rail is formed on the side plate. The rotating member includes a rotating portion, a connecting portion and an engaging portion. The fixing member and the rotating member are assembled to the casing and the back plate of the electronic device. The fixing member is disposed inside the casing but not exposed. As a result, the electronic device is made thinner. The hinge component is not easily damaged under an external force, and the lifecycle of the hinge component is improved. The rotating portion rotates around the connection of the back plate and the casing as a virtual rotating axis. At the same time, the central shaft is driven to slide in the curved guiding rail.