National MP Judith Collins has taken aim at a political meme page on Twitter in what may be a case of mistaken identity.

Ms Collins criticised the "Let's Meme This" Twitter account, a satirical page not affiliated with the Labour Party, but known for making jokes at the expense of rival parties.

She was offended by a joke in which the page compared National MP Matt Doocey to a potato.

"So this is the gentle, kinder, more caring @nzlabour under @Jacinda Ardern," she tweeted.

"Just nasty primary school name calling. Reverse-graduated from student politics to playground childishness."

She posted a screenshot of a tweet from the "Let's Meme This" page.