Provided are a double-stator/double-rotor type motor, in which a double rotor is disposed between an inner stator and an outer stator so as to face the inner stator and the outer stator and form a magnetic circuit with a shortened magnetic path with respect to each of the inner stator and the outer stator, to thereby promote efficiency of the motor, and in which magnets are mounted on inner and outer circumferential surfaces of a back yoke, and a direct drive apparatus for a washing machine using the double-stator/double-rotor type motor. The double-stator/double-rotor type motor includes: a rotor including a first permanent magnet mounted on an inner circumferential surface of a back yoke and a second permanent magnet mounted on an outer circumferential surface of the back yoke; an inner stator that faces the first permanent magnet with a first air gap, to generate a first magnetic field that rotates the rotor; and an outer stator that faces the second permanent magnet with a second air gap, to generate a second magnetic field that rotates the rotor.