A hinge apparatus capable of making a folder of a portable communications terminal to stop in any desired angular positions in accordance with an eye level of its user. The hinge apparatus includes a main body having a pair of hinge arms on opposite sides of its opposed end, a folder having its one end a center hinge arm, a hinge housing fixed to the cavity of the center hinge arm, a hinge shaft having an extension part and a sliding peak disposed opposed to the extension part, a hinge cam having a slot for engaging the sliding peak of the hinge shaft. The hinge cam rotates together with the hinge housing. A hinge spring is disposed between the other end of the hinge housing and one end of the hinge cam.