|Date of birth||19 December 1965|
|Place of birth||Jerusalem, Israel|
|Faction represented in Knesset|
Born in Jerusalem to Kurdish parents, during his IDF national service Raz volunteered to serve as a paratrooper in the Paratroopers Brigade. He served as a soldier and a squad leader. Later on he became an infantry officer, after completing Officer Candidate School, and served as a platoon leader in the elite Maglan unit, where he continues to serve as a reserve major.
An activist, Raz has served as secretary general of Peace Now and director of the non-profit organisation Ir Shalem. For the 1999 Knesset elections Raz was placed 11th on the Meretz list, but missed out on a seat when they won only 10 mandates. However, he entered the Knesset on 25 February 2000 when Haim Oron resigned his seat.
He won eighth place on the party's list for the 2003 elections, but lost his seat when the party was reduced to six seats. Raz was placed 10th on the list for the 2006 elections, but the party won only five seats. Prior to the 2009 elections he won fourth place on the Meretz list, but the party won only three seats.
Six elections in a row, he missed the Knesset by only one seat. 
A Likud Member of Knesset, MK Miki Zohar (Likud) claimed Raz justifies attacks on Israelis. He urged members of Raz's party to “condemn MKs who go on terrorist flotillas and [former Meretz MK] Mossi Raz, who, on the day of the [fatal terror] attack [near Dolev], wrote that it was because of settlements.”  Labor Knesset Member Stav Shaffir dismissed Zohar's statement as "a blatant, ugly, nauseating lie" and asked the Attorney General to investigate Zohar for defamation.
In 2010, Raz along with colleague Maysa Baransi-Siniora was awarded the Outstanding Contribution to Peace prize by the International Council for Press and Broadcasting at the International Media Awards in London for his work with All for Peace radio.
- מוסי רז: תרבות טיוח במשטרת ישראל Israel National News, 2 January 2011 (in Hebrew)
- Parties and Lists The Jerusalem Post
- Candidates for the 16th Knesset Israel Ministry of Foreign Affairs
- List of Candidates: Meretz Knesset website
- Meretz primaries: Ilan Gilon takes top spot Ynetnews, 15 December 2008
- "The man who was almost an MK - six elections in a row". Retrieved 2016-06-25.
- "Likud MK stands behind statement that Left justifies terrorism". The Jerusalem Post | JPost.com. Retrieved 2016-06-25.
- "Likud MK Accuses Left of Justifying Terrorism |". jpupdates.com. Retrieved 2016-06-28.
- Hasson, Nir (2011-11-20). "Communications Ministry Shuts Down Broadcasts by 'Pirate' Israeli-Palestinian Radio Station". Haaretz. Retrieved 2016-06-25.
- "Police shut down Jewish-Palestinian radio station | +972 Magazine". 972mag.com. Retrieved 2016-06-28.
- "Police Shut Down Illegal Arab-Leftist Radio". Arutz Sheva. Retrieved 2016-06-28.
- Deans, Jason (11 May 2010). "Guardian Middle East editor wins peace through media award". Guardian.