A cleaning device (1) of olive residue coming out from a decanter (100) comprising at least one cleaning element (3) arranged so as to lick at least one portion of the inner wall of an olive residue collector (107) suitable for being fixed to the decanter (100) near to the olive residue outlet end, actuation means (5, 6, 7, 9) suitable for actuating said cleaning element (3) along a path corresponding at least in part to the configuration of said inner wall so as to keep the cleaning element (3) licking said part of wall.
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