Abstract: An apparatus for washing slices of a tuberous plant, in particular potatoes comprises a pre-washing unit with a water inlet. The slices are discharged by a slicer which is accommodated in said pre-washing unit. The apparatus further comprises an elongated rotatably supported washing tube connected to the pre-washing unit, and a vibrating sieve following the washing tube for conveying the slices. Said vibrating sieve is mounted above a receiving tank with an outlet and includes three sections. The first vibrating sieve section is adapted to separate shreds from the slices, the second vibrating sieve section comprises a re-washing unit connectable to a water supply, and the third vibrating sieve section is adapted to remove surface water from the slices.