The Keeping Up With The Kardashians star and mother of three shared the black and white image to her Instagram page, where it's gained nearly 300,000 likes overnight.
Unlike Kim's raunchy Paper magazine nude shoot, the image of Kourtney is shot from behind and reveals nothing but her naked bum.
It was taken by photographer Brian Bowen Smith as part of his Metallic Life series. He told Vanity Fair he'd printed the image on metallic paper to highlight the "tantaslising textures of skin."
Kourtney's image is on display at the De Re Gallery in Los Angeles from 22 October until 19 November, alongside other pictures from the collection.
She said: "Love being a part of@brianbowensmith #metalliclife series. Go to vanityfair.com for more images and to read about it. @vanityfair @deregallery."a
All you need to know about Kourtney Kardashian:
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