To provide a stack for a fuel cell capable of improving cooling efficiency of the stack.

The stack for a fuel cell has at least one electric power generating part generating electric energy by chemical reaction of hydrogen and oxygen, and a cooling passage through which a coolant for cooling the electric power generating part is circulated. The cooling passage is composed of a plurality of main passages and at least one or more of branched passages branched from at least one of the plurality of main passages, making the plurality of main passages communicate with each other.