Mazzino Montinari (Lucca, April 4, 1928 – Firenze, November 24, 1986) was an Italian philosopher, germanist, philologer and critic.

He is considered of the greatest editors and intepreters of Friedrich Nietzsche's work.
He confuted that Nietzsche never wrote a book called Der Wille zur Macht (The Will to Power) and that all the editing and the editions published by his sister and other editors were manipulated and too much corrupted to be reputed genuine and reliable to Nietzsche's philosophy.

He published his studies with the renomated Italian publishing house Adelphi, he also founded the international magazine Nietzsche-Studien in 1972. With his critical studies and translation of Nietzsche's oeuvre, Montinari gave the most important contribution to Nietzsche interpretation and comprehension.