The invention provides a rechargeable electric dust cleaner, including: an electric blower (2), a secondary battery (34) as a power supply, a dust detecting unit (47) for detecting dust, a close operation unit (25) for close operation, a first DC power supply unit (44), a battery voltage detecting unit (41) for detecting voltage of the secondary battery (34), a buck unit (42) for performing buck when the battery voltage is high, and a bosst unit (43) for performing boost when the battery voltage is low. Therefore, the rechargeable electric dust cleaner is configured to have a power supply that outputs a constant voltage even if the voltage of the secondary battery (34) is changed so as to perform stable operation.