The present application describes a washing machine, in particular a laundry washing machine, fitted with at least conventional and ultrasonic cloth washing systems, and comprising a tub (1) having at least one hole (20) for housing an ultrasonic transducer (2), wherein said hole (20) is delimited by a flange (4) jutting out from the tub (1) and cooperating with a counterflange (6) for securing the ultrasonic transducer (2) to the tub (1).
