An attack by Tasmania's Greens leader about the Supreme Court appointment of a close friend of Premier Will Hodgman has been slapped down by the Tasmanian Bar.

In Question Time on Tuesday, Greens leader Cassy O'Connor took issue with the appointment of Gregory Geason as a Supreme Court judge.

Mr Hodgman, who also has the portfolio of Attorney-General, has said he had excluded himself from the appointment process because of his relationship with Justice Geason, who was Mr Hodgman's best man at his wedding about 20 years ago.

Ms O'Connor said the selection panel's advice and recommendations regarding the appointment must be released in the "interest of transparency".

"Why was an independent selection panel's recommendation ignored and a dear friend of [the Premier] appointed to the Supreme Court?"

Today, president of the Tasmanian Bar Chris Gunson SC issued a statement in which he said the comments by Ms O'Connor "have the potential to undermine public confidence in the Supreme Court and the administration of the law in Tasmania" and were "not factually sound".

Chris Gunson says the Tasmanian Bar must "defend the judiciary from political attack". ( Twitter: Jonathan Smithers )

"It is disappointing that Ms O'Connor, nor anyone else from the Tasmanian Greens, did not see fit to make enquiries of the Bar regarding the process that was followed in relation to Justice Geason's appointment," Mr Gunson said.

Ms O'Connor's assertions were incorrect, he said.

Mr Gunson said the Tasmanian public could be "assured that proper process was followed in relation to the appointment of Justice Geason to the Supreme Court".

"The independence of the judiciary means that it cannot defend itself from political attacks. The Tasmanian Bar will, however, defend the judiciary from political attack regardless of the political persuasion of the attacker."

Mr Gunson said it was "hardly a secret that Justice Geason is a close friend of the Premier, including the fact that he was his best man at the Premier's wedding many years ago".

"I have been assured by the Premier that he excluded himself from consideration of the appointment of a judge to the Supreme Court to replace Justice [Shan] Tennent, and that he did so because of his close friendship with Justice Geason and to avoid any perception of a conflict of interest," Mr Gunson said.

In Question Time, Premier Will Hodgman and Justice Minister Elise Archer asked Ms O'Connor to withdraw her comments regarding Justice Geason.

Ms O'Connor said she would not back down from her line of questioning.

"Given the close relationship between the appointee and the Premier I still regard the question as legitimate and we have been contacted by members of the legal profession who were questioning the appointment process," she said.