The incident took place in an apartment block in Riccione, a small town near Rimini, La Repubblica reported.
Annoyed with the loud noises from the apartment above him, the pensioner went to his garage to get a hammer before knocking on the door of his neighbour's flat, a woman who is also aged 80.
He reportedly asked to come in to look at her window frames, and waited until the elderly woman turned around before hitting her three times over the head with the hammer.
Neighbours who heard her cries called the police and an ambulance, and the woman was taken to hospital where she is now recovering under observation. Her life is not in danger and she sustained only superficial injuries.
After the attack, the man returned to his flat where he was found by police. He allegedly told them he wanted to kill the woman because he couldn't stand the loud noise of her vacuuming, and that he only regretted not succeeding in the attempt, expressing a wish to 'finish the job'.
He was taken to prison in Rimini following his arrest.