A South Australian judge will face court after hitting a female cyclist while drink driving on Saturday morning.

Justice Anne Bampton allegedly recorded a blood-alcohol reading of 0.121 after the collision on Greenhill Road at Glenside in Adelaide's south-east about 12:25am (ACDT).

South Australia's Chief Justice Chris Kourakis said in a statement the cyclist was not seriously hurt.

Justice Bampton, 51, was reported for drink driving and driving without due care and has been disqualified from driving for six months.

She has also been ordered not to hear court cases associated with driving offences but any other work penalties are still being considered.

Justice Bampton was due to have a ceremonial sitting this Tuesday to mark her appointment to the South Australian Supreme Court after three years as a District Court judge.

In his statement, Justice Kourakis said that sitting has now been cancelled.

He said Justice Bampton has "acknowledged that she made a serious error of judgment in driving when she did."

"Justice Anne Bampton has informed me that after midnight on Saturday the car she was driving collided with a bicycle. On the information I currently have, it appears the female cyclist was not seriously harmed," he said.

"The police attended the accident scene and administered a breath-analysis test. A blood-alcohol reading of 0.12 per cent was recorded. Justice Bampton was placed under an immediate six-month driving licence suspension.

"She is very concerned that her conduct resulted in the collision, putting the cyclist at risk of injury. Justice Bampton has asked me to convey sincere apologies to the cyclist, and to the South Australian community.

"As a result of the incident, the ceremonial sitting to mark her appointment to the Supreme Court, scheduled for Tuesday, 3 December, has been cancelled.

"For now Justice Bampton will not hear matters associated with driving offences. I will give further consideration to the range of matters with which Justice Bampton will deal, and the period of time for which that will be the case, in due course."

Attorney-General 'disappointed' with judge

In a separate statement, South Australian Attorney-General John Rau said he was "obviously very disappointed to learn of this issue."

"I agree with Justice Bampton that she made a serious error of judgment in driving when she did," he said.

"I understand that the Chief Justice is giving consideration to a range of consequential matters. I am confident in the Chief Justice's ability to handle this issue."