A device (10) for treating cellulite and fatty masses comprising means (200) for forming a volume of adipose tissue on a zone to be treated of the body of a subject, means (300) for generating ultrasound and means (400) for generating electric pulses on the volume of adipose tissue formed or at the periphery of the volume of adipose tissue formed, said device (10) being characterised in that the means for generating ultrasound (300) are supported by a supple membrane (500) connected to the means (200) for forming a volume of adipose tissue, and adapted so that, when the device (10) is placed on the zone to be treated of the body of a subject, the means (300) for generating ultrasound remain in contact with the volume of adipose tissue to be treated, and in that the means for generating electric pulses (400) are placed on or at the periphery of a face of the device (10) in contact with the zone to be treated.
