A washing machine includes a balancer to offset unbalanced load generated during rotation of a drum, wherein the balancer includes a balancer housing mounted at the drum, the balancer housing having an annular channel defined therein, a balancing module disposed in the annular channel such that the balancing module is movable when electric power from a power source outside a cabinet is supplied to the balancing module, a conductive film, one side of which is attached to an inside of the balancer housing and the other side of which is provided with a conductive rail to supply electric power to the balancing module, and an electric wire to electrically connect the power source outside the cabinet to the conductive rail.