Provided are a cell pack having a restraint mechanism which is unlikely to be loosened or broken even when a restraining pressure is applied which is higher than, for example, in the related art, andalso a method for producing and a method for disassembling the cell pack. The cell pack includes a plurality of unit cells arranged in an arrangement direction and a restraint mechanism for restraining these unit cells. The restraint mechanism includes: a first end plate portion disposed at an end portion in a first direction of the arrangement direction of the plurality of unit cells; a second end plate portion disposed at an end portion in a second direction of the arrangement direction of the plurality of unit cells; and a ring-shaped restraining hoop portion including a first support portion disposed on a surface of the first end plate portion in the first direction, a second support portion disposed on a surface of the second end plate portion in the second direction, and a pair of side wall portions continuously connecting the first support portion and the second support portion along the arrangement direction. A dimension in the arrangement direction between the first end plateportion and the second end plate portion of the restraining hoop portion is set such that a predetermined restraining pressure is applied in a direction of compressing the plurality of unit cells along the arrangement direction.