PURPOSE: To provide a cooling device of an automatic vending machine without showing any problem of decreasing a cooling performance or a shortage of its life even after its use of longer hour by a method wherein dusts may easily be removed from a filter.

CONSTITUTION: A relay 8 having an auxiliary contact point 8a of a c-contact point type is connected in parallel with a compressor 3. As the compressor 3 is electrically energized, the relay 8 is also energized, its auxiliary contact point 8a is set to its (d) side, for example. A cooling fan 5 mounted in a cooling device 1 so as to supply cooling air to a condensor 4 is rotated forwardly, for example. As a thermostat 7 is operated and an electrical supplying for the compressor 3 is terminated, the auxiliary contact point 8a is changed over to (e) side and the cooling fan 5 is rotated in a reverse direction. Dust accumulated at the filter is removed from the filter when the cooling fan 5 is rotated in a forward direction and the dust is also removed from the filter when the cooling fan 5 is rotated in a reverse direction under receiving of air pressure in a direction opposite to that of the cooling fan 5 and its accumulated amount is reduced, resulting in that an excessive accumulation of dust can be prevented without cleaning of the filter after its removal from the cooling device.