Queensland's public trustee Peter Carne has been suspended after serious allegations were made against him.

Attorney-General Yvette D'Ath says Mr Carne was suspended on Thursday, pending a show cause notice, after serious allegations that "could amount to misbehaviour under the Public Trustee Act".

Ms D'Ath's brief statement says Samay Zhouand has been appointed as acting Public Trustee effective immediately.

The public trustee deals with the estates of people who've died when no executor has been appointed.

On the website, Mr Carne says the trustee is there during the times of grief and loss when Queensland families need it the most.