Queensland Premier Peter Beattie says he has smacked all three of his children and he does not support a push for law changes in the area.
The criminal code currently contains a 'domestic discipline' defence for a parent using physical force.
But Labor MP Dean Wells says it should be removed because it is protecting parents who go too far.
He will make his case at a public forum on children's rights at Parliament House today.
Mr Beattie says he has spoken with Mr Wells about the issue but he disagrees.
"I think that any parent has the right in my view, within reason, provided there's no permanent damage or injury, to smack their child," he said.
"And if anyone wants to plead guilty, I do, I did.
"I respect Dean's view, I don't agree with him."
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