Disclosed is a washing machine having a cabinet forming an outer appearance and having an inlet port formed at the front, a tub provided inside the cabinet for storing wash water, a drum provided inside the tub to be rotatable, and a door installed in the cabinet for opening and closing the inlet port. The door is provided with an auxiliary door which can be freely opened and closed during the washing process independently of the door, so that laundry can be added even during the washing process.