To solve problems associated with a conventional drum type washing machine employing a method in which a so-called lifter configured to be fixed to lift up and drop off laundry is arranged in a drum to wash the laundry by lifting up and dropping off the laundry, and in which the washing time is long due to weak mechanical force applied to the laundry.

A drum type washing machine employs a so-called lifter in a shape of a rotary roller for lifting up and dropping off laundry in a drum. A plurality of rotary rollers are arranged and each roller has a cylindrical shape or a shape of beads arranged in a line.