A sterilization apparatus for sterilizing receptacle closures, comprising: - a guide sector, the apparatus being configured, for each closure, so that the closure is sterilized during a movement of the closure along the guide sector, the apparatus being configured so that, for each closure, the closure is sterilized by introducing a sterilization agent in said guide sector; - a sterile and/or aseptic chamber, the guide sector being located within the chamber; - a first track sector located outside with respect to the chamber; - a plurality of first carts mechanically independent from each other; - a second track sector located within the chamber; - a plurality of second carts mechanically independent from each other; - a plurality of pushers; wherein the apparatus is configured so that: - for each first cart, the first cart can be subjected to a movement along the first track sector and outside the chamber; - for each second cart, the second cart can be subjected to a movement along the second track sector and within the chamber; - for each pusher, the pusher can be subjected to a movement along the guide sector and within the chamber; - for each pusher, the movement of the pusher along the guide sector corresponds to the movement of at least one closure along the guide sector, by means of the pusher pushing the at least one closure; - for each second cart, the movement of the second cart along the second track sector corresponds to the movement of a respective pusher along the guide sector, by means of a mechanical coupling between the second cart and the pusher; - for each first cart, the movement of the first cart along the first track sector corresponds to the movement of a respective second cart along the second track sector, by means of magnetic and/or electromagnetic interaction between the first cart and the second cart; - the guide sector and the first track sector are located on opposite sides of the second track sector. - a guide sector, the apparatus being configured, for each closure, so that the closure is sterilized during a movement of the closure along the guide sector, the apparatus being configured so that, for each closure, the closure is sterilized by introducing a sterilization agent in said guide sector; - a sterile and/or aseptic chamber, the guide sector being located within the chamber; - a first track sector located outside with respect to the chamber; - a plurality of first carts mechanically independent from each other; - a second track sector located within the chamber; - a plurality of second carts mechanically independent from each other; - a plurality of pushers; - for each first cart, the first cart can be subjected to a movement along the first track sector and outside the chamber; - for each second cart, the second cart can be subjected to a movement along the second track sector and within the chamber; - for each pusher, the pusher can be subjected to a movement along the guide sector and within the chamber; - for each pusher, the movement of the pusher along the guide sector corresponds to the movement of at least one closure along the guide sector, by means of the pusher pushing the at least one closure; - for each second cart, the movement of the second cart along the second track sector corresponds to the movement of a respective pusher along the guide sector, by means of a mechanical coupling between the second cart and the pusher; - for each first cart, the movement of the first cart along the first track sector corresponds to the movement of a respective second cart along the second track sector, by means of magnetic and/or electromagnetic interaction between the first cart and the second cart; - the guide sector and the first track sector are located on opposite sides of the second track sector.