Disclosed herein is a washing method of a washing machine. The method comprises supplying water into the washing machine, forming an agitating water stream by rotating at least one of an inner tub and a pulsator to generate agitating force, and disentangling laundry by rotating the inner tub in one direction at a speed causing the laundry to be forced against an inner wall of the inner tub by centrifugal force while allowing water to drop down into the inner tub after being raised in the washing machine. With the method, an inner tub is rotated in one direction so as to form an alpha-shaped water stream at a laundry disentangling step in a state wherein water is supplied to a predetermined level, so that the laundry is completely forced against the inner wall of the inner tub by circumferential force, thereby enhancing washing and rinsing efficiency as well as disentangling effect.