A fuel cell is disclosed. The fuel cell includes a cell stack including a plurality of unit cells stacked in a first direction, an enclosure surrounding side portions of the cell stack and including at least one opening to expose at least one of opposite end portions of the cell stack therethrough, first and second end plates respectively disposed at the opposite end portions of the cell stack, and a gasket disposed between a target end plate disposed in the at least one opening in the enclosure, among the first and second end plates, and the enclosure in order to seal the cell stack.