The 50-year-old was put under house arrest on Saturday for allegedly abusing the girl in the school toilets, Rai News reported.
The six-year-old told her parents in October that she had been assaulted by the caretaker, prompting a police investigation.
The news comes two weeks after parents in northern Italy accused a priest of sexually abusing their daughters. The priest in Agordino allegedly abused ten girls who went to his church, where he had worked for seven years.
READ MORE: Italian priest accused of sexually abusing ten girls
In December, Italian police cracked a paedophile network operating across 16 regions, following a tip-off from authorities in Germany. Investigators confiscated 11,500 images and 3,500 videos, all involving children under the age of ten.
READ MORE: Police bust paedophile network across Italy
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