Abstract: There is provided a hinge rotatably connecting a first body to a sacond body, including (a) a main body to be fixed onto the first body, the main bodyr including a hollow cylindrical portion horizontally extending, (b) a rotation shaft fixed at one end to the second body and rotatably connected at the other end to the main body, (c) an outer collar connected to the hollow cylindrical portion of the main body in a direction in which the hollow cylindrical portion extended extends and (d) a frictional collar filling space therewith between the rotation shaft and both the outer collar and the hollow cylindrical portion. For instance, the first body may be a keyboard, and the second body may be a display screen in a note-type computer. The hinge ensures smooth rotation between the first and second bodies, and further ensures a greater upper limit in the rotation number than that of a conventional hinge used in a note-type computer.