A washing machine having height adjustable legs is provided. The washing machine may include a base provided at a bottom of the washing machine, a plurality of legs coupled to the base, and an over-unscrewed prevention member provided with each leg. Each leg may include a bolt that is height-adjustably assembled at the base. The over-unscrewed prevention member may be provided at the bolt of each leg and caught by the base when the legs are unscrewed so as to set a maximum unscrew height of the legs.