A device for pasteurizing a mass of foodstuff comprises: a feed； at least one first tube, connecting to the feed, of an electrically and magnetically inert material suitable for contact with food； two plate-like electrodes which are situated on either side of the first tube and which are connected to an RF power generator, whereby the mass present in the first tube is heated dielectrically in this first tube； a first jacket filled with a heatable first liquid and extending around the first tube； and heating means which connect to the first tube and in which the hot mass is held at practically constant temperature； at the end of which heating means the hot mass is discharged for further processing, such as cooling, portioning and packaging.
