A tub, with a bearing housing inserted therein, and a washing machine having the same. The washing machine includes a bearing housing and a tub, the tub having a rear wall portion in which the bearing housing is inserted. The bearing housing includes a cylindrical hub having bearings, a stator mounting portion surrounding the hub, the stator mounting portion having concave portions and convex portions formed in a repetitive pattern in a circumferential direction, and an expansion portion surrounding the stator mounting portion, the expansion portion having radial ribs formed in a repetitive pattern in a circumferential direction.