A hinge includes a first connector, a lining, a bush and a second connector. The first connector includes a root and a socket extended from the root. The root can be connected to a host of a laptop computer. The lining is fit in the socket so that the lining cannot be rotated in the socket. The bush is fit in the lining so that the bush cannot be rotated in the lining. The second connector includes a shaft and a plate extended from the shaft. The shaft is rotationally inserted in the bush. The plate can be connected to a liquid crystal display of the laptop computer.