Auger cleaning device (8, 8', 800, 800') for removing debris from a helical drilling tool of a drilling machine, said helical drilling tool being provided with one or more threads and having a longitudinal axis, and arranged for drilling ground, the cleaning device (8, 8', 800, 800') comprising: - a tool-holder support arranged for being constrained to a guiding tower of the drilling machine and arranged for reversibly passing from an open configuration to a closed configuration; - at least one cleaning tool constrained to the tool-holder support; - the tool-holder support comprises a first jaw and a second jaw arranged for reversibly opening and closing between the open configuration and the closed configuration of the tool-holder support, characterized in that each of the first jaw and the second jaw comprising a static part (11,11';11B,11B') and a rotating part (13,13',31) mounted inside the static part, said rotating part being rotatable about the longitudinal axis of the helical drilling tool when the first jaw and the second jaw are in the closed configuration - the cleaning tool is constrained to the rotating part of the tool-holder support and arranged for being actuated in rotation by an actuation system (12, 12',12", 4) - in the closed configuration the tool-holder support forms a pass-through opening arranged for allowing the passage of the helical drilling tool, the cleaning tool engaging with the one or more threads of the drilling tool and, actuated by the actuation system (12, 12',12", 4), the cleaning tool is arranged for rotating around the longitudinal axis of the helical drilling tool running along the one or more threads so as to remove the debris lying on the drilling tool; - in the open configuration the cleaning tool is disengaged from the drilling tool and is farther from it with respect to how far it is in the closed configuration - the cleaning device comprising a locking and safety system (22,22a) arranged for locking the rotating parts (13,13',31), in a precise position with respect to the static parts (11,11';11B,11B') enabling the opening of the first jaw and the second jaw from the closed configuration to the open configuration of the tool-holder support when the rotating parts face the corresponding static parts and are completely contained in the corresponding static parts (11,11';11B,11B'). - a tool-holder support arranged for being constrained to a guiding tower of the drilling machine and arranged for reversibly passing from an open configuration to a closed configuration; - at least one cleaning tool constrained to the tool-holder support; - the tool-holder support comprises a first jaw and a second jaw arranged for reversibly opening and closing between the open configuration and the closed configuration of the tool-holder support, characterized in that each of the first jaw and the second jaw comprising a static part (11,11';11B,11B') and a rotating part (13,13',31) mounted inside the static part, said rotating part being rotatable about the longitudinal axis of the helical drilling tool when the first jaw and the second jaw are in the closed configuration - the cleaning tool is constrained to the rotating part of the tool-holder support and arranged for being actuated in rotation by an actuation system (12, 12',12", 4) - in the closed configuration the tool-holder support forms a pass-through opening arranged for allowing the passage of the helical drilling tool, the cleaning tool engaging with the one or more threads of the drilling tool and, actuated by the actuation system (12, 12',12", 4), the cleaning tool is arranged for rotating around the longitudinal axis of the helical drilling tool running along the one or more threads so as to remove the debris lying on the drilling tool; - in the open configuration the cleaning tool is disengaged from the drilling tool and is farther from it with respect to how far it is in the closed configuration - the cleaning device comprising a locking and safety system (22,22a) arranged for locking the rotating parts (13,13',31), in a precise position with respect to the static parts (11,11';11B,11B') enabling the opening of the first jaw and the second jaw from the closed configuration to the open configuration of the tool-holder support when the rotating parts face the corresponding static parts and are completely contained in the corresponding static parts (11,11';11B,11B').