BATTERY MODULE

A battery module includes: a cell-stacked body constituted by stacking a plurality of cells; a plurality of bus bars, each of which connects terminals of adjacent cells; and a sensor device configured to detect a voltage of each cell. The sensor device is disposed above the plurality of bus bars disposed on an upper surface of the cell-stacked body as viewed from a width direction perpendicular to a stacking direction and an up-down direction, and includes a connector having a connection portion in the width direction. Each of the bus bars has a bent portion protruding upward between the cells to be connected. The connector is disposed between the bent portions of adjacent bus bars in the stacking direction, and a lower surface of the connector is provided at a position lower than an upper portion of the bent portion in the up-down direction.