A battery module 1 comprises an array body 3 of battery cells 2; an elastic body 5 disposed against the array body 3; a restraining member 4 for restraining the array body 3 in the arraying directionof the battery cells 2 with the elastic body 5 interposed therebetween; a plurality of harnesses 21 extending along the arraying direction, each having at the tip thereof a connection terminal 25 connected to an electrode terminal 7 of a predetermined corresponding battery cell 2; and bundling members 22, each for bundling a plurality of harnesses 21 into a harness bundle 23. Each of harness 21 bundling positions 26 yielded by each of the bundling members 22 is positioned on the side that is away from the elastic body 5 relative to a corresponding connection position 28 between the corresponding electrode terminal 7 and connection terminal 25. Each of the harnesses 21 branching from the bundling members 22 has a bend between the bundling position 26 and the corresponding connection position 28.