Tamaz Avdaliani was born on September 16, 1964 in Tbilisi. He graduated from TSU, Law Faculty. In 1991-2006 he was the member of the Georgian Bar Board.

In 2006-2012 continued his activity in LEPL Bar Association of Georgia. Since 2012, T. Avdaliani was the member of the Parliament by party list from the Block “Bidzina Ivanishvili-Georgian Dream”.