Thamir Abbas Ghadhban (Arabic: ثامر عباس غضبان) (born in Karbala, 16 April 1945) is an Iraqi civil servant and politician.

[4][5] In 2005 he became a Parliament member and the head of one of the six committees, his committee was in charge of writing chapter four: Powers of the Federal Authorities in the permanent constitution[6] Constitution of Iraq#Chapter Four: Powers of the Federal Authorities and one of three technocrats to draft Iraq's much debated oil and gas law, which is still waiting to be approved by the parliament.

[7] In late April 2006, there was strong speculation that he would again be appointed Minister of Oil, this time by the government of Nuri al-Maliki.

[8] Up until early 2018 he served as the chairman of the prime minister's advisory committee.

In April 2016 he was awarded the Japanese Imperial Decorations the Order of the Rising Sun, Silver Star, and Gold Star by Emperor Akihito of Japan, in recognition of his contribution to developing economic relations and promoting mutual understanding between Japan and Iraq.