A treatment apparatus (1) of closures (2, 22) for containers using a sterilizing substances, comprising: a rotating unit (6)； dispensing means (16) of the sterilizing substance； at least two types of rails (7a, 7b), longitudinal and parallel, of which a first type of rails (7a) houses, by force of gravity, a first format of closures (2) and a second type of rails (7b) houses, by force of gravity, a second format of closures (22), the rails (7a, 7b) being solidly constrained to the rotating unit (6) and being arranged in such a way as to follow a circumferential extension thereof.
