Abstract: To provide for fully or partly automatic cleaning and to avoid pollution of the air in the surrounding room, a cleaning device for cleaning the inner surface of containers (7, 8) is arranged so that an upwardly open jacket (1, 2) may be moved upwards to enclose a container. A nozzle (21, 22) is fitted in the jacket for ejecting a granulate and a scavenging medium, respectively. At the upper part of the jacket (1, 2) there is mounted a ring-shaped brush (29, 30) to prevent dust from escaping. The containers (7, 8) are so journalled in this suspension that they can be rotated during the cleaning process.