Abstract: The present invention relates to an electro-mechanical waste compactor which can operate also with 28 V power and of particularly reduced dimensions and weight. In particular, the invention relates to a waste compaction device which can be employed for civil uses, in particular for domestic use or on board of all the transportation means that require a big space economy for the auxiliary service equipment, as, for example, trains, ships and vessels in general, aircrafts, coaches, caravans etc. The compaction device of the invention can be conveniently installed in appropriate bays, fixed or movable on wheels, such as a trolley, to allow its ease of movement in a transportation means, and its insertion in the appropriate service spaces.