BATTERY RETAINMENT BLOCK AND BATTERY MODULE

A battery retainment block 1 includes a plurality of block pieces 10 each having a battery storage unit 11 for retaining a battery 2. The plurality of block pieces 10 are aligned and, among the plurality of block pieces 10, two block pieces 10 that are adjacent to each other are coupled together. A gap 15 is provided between the two block pieces 10 that are adjacent to each other to serve as a circulation space for circulating a medium.