Object: To provide a cell stack device having improved electrical conductivity, a module, and a module-containing device. Resolution means: An electrolytic cell stack device according to the present invention includes a plurality of cells (3) having a columnar shape and an electrically conductive member (4) disposed between two of the cells (3) that are adjacent to each other, and connected to each of the two of the cells (3) with a bonding material (15) having electrically conductive property. The bonding material (15) contains electrically conductive particles and fibrous bodies (16) having electrically insulating properties, and a major axis direction of the fibrous bodies (16) is oriented in a predetermined direction in regions where the electrically conductive member (4) faces the two of the cells (3).