Compattatore (1) for refusals, in which a container to estate (4) it lodges a bag (13) of termosaldabile material inner, introducing an own opening (18) through which it receives the refusals; the compattatore being supplied of a device (42) of aspiration in order to extract of the air from bag (13) and of a device (23) of closing of bag (13) through termosaldatura of the bag (13) same with a sheet (13a) of termosaldabile material, arranged to closing of opening (18). (FIGURE 2)