An extruder for an ice machine essentially made up of a monoblock body which is configured from a first body essentially joined to a second cylindrical body, hollow as well in the central portion thereof, and that on the lower portion thereof defines a threaded portion for the joining thereof to an ice machine, through a plurality of holes; and wherein, in the central portion of the body coinciding with the central portion of the second body, a plurality of hollows are located in each body, which determine the inlet and the outlet of a series of channels through which the ice passes towards the outlet of the cited extruder, and wherein said hollows have a “kidney” shape with one concave side and another convex one.