A drum washing machine includes an elastic support mechanism elastically supporting a water tub. The support mechanism includes an oil damper and coil spring. The oil damper includes a cylinder having an opening, a tapered cap mounted so as to close the opening of the cylinder, and a piston rod extending through the tapered portion of the cap. The piston rod has one end connected to the piston and the other end on which a washer is mounted so as to be prevented from falling off. The coil spring has one end including a part with a smaller winding diameter than the other portion. The coil spring is disposed so that the piston rod extends through the coil spring such that the end with the smaller diameter is wound on the tapered portion of the cap. The other end of the coil spring is received by the washer.