A coating device with a movable spray nozzle set, the coating device comprising a coating container that houses a rotating and perforated drum intended to stir a mass of articles to be coated during the rotation of the drum, the mass of articles defining a free surface, the coating device further comprising a positioning group of the set of spray nozzles for spraying a product with which one desires to coat the articles while they are stirred by the drum, characterized in that said positioning group comprises - a control column, able to be located essentially axially inside the drum, and which houses an inner shaft, - the control column being equipped with at least an articulated arm which has a first part and a second part articulated together around a first shaft, the first part rotating in conjunction with the control column and a spray nozzle set carrier being joined in an articulated way around a second shaft to the second part of the articulated arm, both first and second shafts (11, 12) parallel to each other and to the control column, - a transmission system based on pulley means and corresponding pulling means housed in the control column and in the articulated arm which simultaneously produce the contraction or extension of the articulated arm and the rotation of the spray nozzle set carrier with respect to the second part of the aforementioned articulated arm based on the relative angular position between the control column and the inner shaft; the positioning group further comprising - a first actuator and a second actuator (5a, 6a) to actuate, from outside the container, the rotation of the control column and of the inner shaft, respectively, to thereby vary the angular position to the user's convenience and with it the degree of extension of the articulated arm and the orientation of the spray nozzle set carrier. - a control column, able to be located essentially axially inside the drum, and which houses an inner shaft, - the control column being equipped with at least an articulated arm which has a first part and a second part articulated together around a first shaft, the first part rotating in conjunction with the control column and a spray nozzle set carrier being joined in an articulated way around a second shaft to the second part of the articulated arm, both first and second shafts (11, 12) parallel to each other and to the control column, - a transmission system based on pulley means and corresponding pulling means housed in the control column and in the articulated arm which simultaneously produce the contraction or extension of the articulated arm and the rotation of the spray nozzle set carrier with respect to the second part of the aforementioned articulated arm based on the relative angular position between the control column and the inner shaft; the positioning group further comprising - a first actuator and a second actuator (5a, 6a) to actuate, from outside the container, the rotation of the control column and of the inner shaft, respectively, to thereby vary the angular position to the user's convenience and with it the degree of extension of the articulated arm and the orientation of the spray nozzle set carrier.