Michael Roiz (Russian: Михаил Владимирович Ройз, romanized: Mikhail Vladimirovich Royz, born 12 October 1983[1] in Russia) is an Israeli chess Grandmaster.

At the Gibraltar Masters in 2007, he shared 5th place in a very strong field, behind GMs Vladimir Akopian, Alexander Areshchenko, Hikaru Nakamura, and Emil Sutovsky.

In the same year he tied for 1st–6th with Vitali Golod, Mateusz Bartel, Yuri Yakovich, Zahar Efimenko and Mikhail Kobalia in the 16th Monarch Assurance Isle of Man International tournament.

In 2005, he qualified for the World Cup in Khanty-Mansiysk 2005, but lost to Alexander Motylev ½–1½.

Among his prominent students is the international player Ariel Erenberg.