| Type: | Bishop |
| Honorific-Prefix: | The Most Reverend |
| Pietro Cancellieri | |
| Bishop of Lipari | |
| Church: | Catholic Church |
| Diocese: | Diocese of Lipari |
| Term: | 1571–1580 |
| Predecessor: | Antonio Giustiniani |
| Successor: | Paolo Bellardito |
| Consecrated By: | Giulio Antonio Santorio |
| Death Date: | 1580 |
| Death Place: | Lipari, Italy |
Pietro Cancellieri (also Pietro Cavalieri) (died 1580) was a Roman Catholic prelate who served as Bishop of Lipari (1571–1580).[1]
On 3 October 1571, Pietro Cancellieri was appointed during the papacy of Pope Pius V as Bishop of Lipari. On 7 October 1571, he was consecrated bishop by Scipione Rebiba, Cardinal-Priest of Santa Maria in Trastevere, with Umberto Locati, Bishop of Bagnoregio, Eustachio Locatelli, Bishop of Reggio Emilia, serving as co-consecrators. He served as Bishop of Lipari until his death in 1580.