PROBLEM TO BE SOLVED: To suppress small an amplitude in ordinary dehydrating revolution at the time of dehydration by correcting the uneven location of laundry by controlling a driving device and/or a water supply valve and a water drain valve corresponding to the amplitude detected result from 1st and 2nd imbalance detectors at the time of dehydrating operation. SOLUTION: 1st and 2nd imbalance detectors 17 and 18 are adjacently installed so as to prevent the effect of the amplitude of whirling caused by difference in fitting positions, and turned on/off while being interlocked with the open/close of a lid 2. Further, in the state of closing the lid 2, the 1st imbalance detector 17 detects the amplitude of whirling at the upper part of an outer tub 3 exceeding the value set as an allowable amplitude at the time of 1st-order and 2nd-order resonant point passage in the case of starting dehydration operation while using a detection lever 17a arranged away from the outer peripheral face of the upper part of the outer tub 3. Then, the 2nd imbalance detector 18 detects the amplitude of whirling of the outer tub 3 exceeding the allowable amplitude value in an ordinary dehydrating revolution area exceeding the 2nd-order resonant point.