To provide a drum type washing machine for improving detergency.

The drum type washing machine includes a rotary drum for housing clothes, a plurality of lifters provided on the outer peripheral wall of the rotary drum, an outer tub for housing the rotary drum and accumulating water, a motor for driving the rotary drum, and a casing for supporting the outer tub. A plurality of raised parts radially extending from the center are provided on the bottom wall of the rotary drum, and a plurality of projections in a projected shape are provided on the flat part of the bottom wall. Thus, since the clothes raked up by the lifters by the rotation of the rotary drum rub each other with the projections in the projected shape, the effect of removing dirt is improved.