A safety closure for containers comprising a cover (3) and an internal element (4), the internal element being formed of a constraining portion (5) and a covering portion (6), the covering portion and the constraining portion being at least partially interconnected by means of at least a first preferential breakage zone (7B) which, when intact, joins them to each other, the constraining portion being provided with blocking means at the neck of a container with which the closure is intended to be associated and with first constraining means (10) which removably attach the cover, the internal element having sealing means (12) which, at least when the seal is intact, preserve the container content integrity.