The meeting took place in the papal summer retreat of Castel Gandolfo, in the hills south of Rome. The Vatican did not immediately release details of the talks, the first since Peres became president in July.
Peres, holding five days of talks with political and business leaders in Italy, said Wednesday that recent meetings between Israeli and Palestinian leaders and the flurry of diplomatic activity in the Middle East could be the most promising developments yet in efforts to bring peace to the region.
"The overall atmosphere is encouraging," he said after meeting in Rome with Italian Premier Romano Prodi.
Benedict has issued several appeals for peace in the Middle East in recent months.
The Vatican and Israel established diplomatic relations in 1993. However, a long-standing tax dispute has irritated relations between the two sides, and is seen by Israel as the main obstacle to wider cooperation.
The Vatican is seeking ways to lessen its tax burden as one of the significant land owners in the Holy Land and wants access to Israeli courts to handle any quarrels over ownership.
Israel strongly resists giving any special tax exemptions to the Vatican and has offered to create a special panel to oversee property cases involving the Vatican. Israel fears that giving special tax terms to the Vatican could open the door for other churches and groups to seek similar loopholes.
On Thursday, Benedict also met with Saudi Foreign Minister Prince Saud, and a day earlier with the Syrian vice-president, Farouk al-Sharaa.
This weekend Peres travels to an international political and finance conference on Lake Como, which annually gathers world leaders, including statesmen from Arab countries.
Austria does not intend to expel Russian diplomats because of the spy scandal