A washing method in a steam injection type washing machine in which wash water is heated to generate high temperature and high-pressure steam while passing through the steam supply unit in the wash or rinse cycle, and the generated steam is injected into the wash tub at the top of the wash tub. Accordingly, it is possible to rapidly achieve the wetting of clothes with wash water while achieving an enhancement in sterilization and washing performances. In addition, consumption of water and electrical energy can be reduced.