Queensland judges may blacklist Attorney-General Jarrod Bleijie for leaking details of a private discussion with Court of Appeal president Justice Margaret McMurdo.

Judicial Conference of Australia vice president Justice Steven Rares said on Wednesday Mr Bleijie had improperly revealed details of his conversation with Justice McMurdo.

Justice Rares said judges should be able to discuss an important issue "frankly" with MPs and without concern what they say will be publicised.

"It would be most unfortunate if senior judges felt inhibited from offering frank advice because they could not be sure that it would be kept completely confidential," he said.