A laundry treatment machine may include an outer tub having an opening at a top through which laundry is inserted. The outer tub may contain wash water for washing the laundry. An inner tub may be rotatably provided inside the outer tub. A pulsator may be rotatably provided at a bottom of the inner tub to generate a current or flow of water flowing at a lower part of the inner tub. A water current generating protrusion that protrudes inward from a peripheral surface of the inner tub and extends upward from a bottom end of the inner tub may generate a current or flow of water flowing along an upper part of the inner tub.