The invention relates to a battery module in which to avoid increasing the size in a direction where batteries and heat conduction parts are arranged in line. The battery module includes: a plurality of batteries arranged in line in a first direction; a heat conduction element comprising a plurality of heat conduction portions arranged in line in the first direction, each of which is disposed between two of the plurality of batteries to transfer heat from the batteries; and a clamp member comprising wall portions provided at a first end side and the other end side of the plurality of batteries and the plurality of heat conduction portions in the first direction, the wall portions being provided along a direction intersecting the first direction, the wall portion at the first end side and the wall portion at the other end side pressing the plurality of batteries and the wall portion. plurality of heat conduction parts. Selected drawing: Figure 5
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