ELECTRIC VACUUM CLEANER

There is provided an electric vacuum cleaner which accurately determines a spark failure of an electric blower to prevent smoking and ignition from occurring in the electric blower. The electric vacuum cleaner 1 includes a spark detector 31 which detects a spark caused by the friction between a commutator 23 and a carbon brush 26 in the electric blower 10 which causes a suction negative pressure to act on a dust collecting chamber 7; and a control unit 32 which controls the electric blower 10 based on spark detection information from the spark detector 31. The spark detector 31 calculates a difference between a previous value and a most recent value of sampled values; estimates a next value from the difference; and when the difference between an estimated value and a measured value is greater than a predetermined value, the control unit 32 stops the operation of the electric blower 10.