As a cell-encapsulating device that may supply sufficient oxygen to cells in an implant part and therefore encapsulate a larger cell aggregate, there is provided a cell-encapsulating device comprising a plurality of capsule-form structures arrayed in two-dimensional directions in the same plane, wherein at least a part of outer shells of the capsule-form structures is formed from an oxygen-permeable membrane, and cells are encapsulated in the inside of the capsule-form structures.
