Tuna skinning machine, intended for skinning the fish after cooking it and its fragmentation in four loins, characterized in that on an elongated frame ,
 at least one longitudinal conveyor belt is installed, for dragging of the loins in alignment, conveyor belt on which a vertical axis brush moving horizontally, a second tilted axis brush , next to the horizontal and moving vertically and a vertical axis cutter moving horizontally are installed, the first two actuating on the skin of the loin and the cutter on the dark meat, structure which can be repeated throughout the bed and after which at least two other brushes, and a third brush for removal of the dark meat instead of the aforementioned cutter are installed.