Legal Aid's decision to fund an appeal for a father who pimped out his daughter to other paedophiles has been labelled "amazingly stupid" by West Australian Corrective Services Minister Joe Francis.

The man, who cannot be named for legal reasons, was jailed for 22-and-a-half years after pleading guilty to more than 220 charges relating to the abuse of the young girl, who is now in her early teens.

The court was told the 42-year-old father met other men through online advertisements and offered the girl to them for sex while he watched or participated.

But the man is arguing the sentence is too harsh and Legal Aid has confirmed it is funding his appeal.

Corrective Services Minister Joe Francis said Legal Aid needed to take a good hard look at its priorities.

"Their job is to help people have a fair legal hearing in our justice system that wouldn't have otherwise got one," he said.

"For someone who pleaded guilty, I think Legal Aid need to go and have a good hard look at their priorities.

"I think you can find there's probably other people that need their assistance before he does.

"You've got, for whatever reason, mums or dads who are trying to get fair access to custody of their children — a lot of dads in my electorate that would love to have more access to their children following a breakdown of a marriage or a relationship.

"[There are] all kinds of issues that need addressing through our legal system far more importantly than a child molester, or the guy who put his kid up for it, having his sentence reduced.

Legal Aid's role is to ensure 'full and proper access to justice'

Legal Aid WA defended its decision to fund the appeal, saying it had no choice in the matter, the case had legal merit and the organisation had the necessary funds.

"We have no choice, the principle is that a person has full access to justice and that includes ensuring that the sentence they receive is appropriate in the eyes of the law," spokesman Malcolm Bradshaw said.

"For that reason we will analyse the legal merit put forward by their lawyer for the application and if legal merit exists we will grant the application."

Mr Bradshaw said it was not surprising that in some cases it was difficult for people to accept.

"It's understandable that members of the public might be outraged that people who've been convicted of extremely serious crimes, abhorrent crimes, receive this level of assistance … but the role of the Legal Aid Commission is to ensure people receive access to justice, full and proper access to justice," he said.