The present invention provides a heating device for an end plate of a fuel cell stack, which can prevent a decrease in temperature of unit cells around the ends of the fuel cell stack by providing a structure for circulating high temperature coolant discharged from the fuel cell stack in the end plate. Non-uniform temperature distribution in the fuel cell stack can thereby be prevented. In particular, a heating device for an end plate of a fuel cell stack is provided wherein high temperature coolant flowing from the upstream of a coolant outlet manifold to the downstream is allowed to circulate through the inside of the end plate and to be discharged to the outside such that the thermal energy of the coolant is supplied to the end plate and, at the same time, transferred to unit cells adjacent to the end plate.