To provide a dish washer and dryer highly efficiently drying dishes without giving heat damage to the dishes even if a temperature detecting sensitivity of a thermistor is weakened.

This dish washer and dryer is provided with a temperature sensor detecting an ambient temperature and a blast temperature control means controlling the temperature of air sucked by an air suction fan based on the temperature detected by the temperature sensor. This dish washer and dryer calculates a temperature change from starting the drying of the tableware to a predetermined time lapse using the temperature sensor, and reduces heating amount of a heat supply, when the calculated temperature change is larger than the predetermined value.