Abstract: A dish washer is disclosed, in which assembly of the dish washer is improved, and an error operation and trouble of a driver due to water leaked in a base can be avoided. To this end, the dish washer includes a tub (3) provided with a space for washing the dishes and a communication hole (3a) formed on the bottom, a base (100) fixed to the bottom of the tub (3), having a plane portion (100a) which is not connected with the outside, a sump assembly (200) provided in the plane portion of the base and fixed to the tub (3) while shielding the communication hole (3a) of the bottom, having a sump (220) and a driver (210), wherein washing water is received in the sump (220) and the driver (210) transmits a driving force to the sump (220), and a leakage sensing device (300) provided in the base (100), sensing a water level of washing water leaked in the base (100). Thus, assembly of the dish washer can be improved, and also life span of the driver can be increased.