Queensland's Electoral Commissioner, Walter van der Merwe, has resigned.

It is understood Mr van der Merwe sent Governor Paul de Jersey a letter on Wednesday, advising him of his decision.

Queensland Electoral Commissioner Walter van der Merwe has resigned. Credit:ECQ

It comes two days after Attorney-General Yvette D'Ath announced she would immediately suspend Mr van der Merwe, pending a show cause notice, following a "serious allegation" which could amount to misbehaviour.

Ms D'Ath said the allegations were serious but did not suggest inappropriate interference in the outcome of elections.