The designer has been Creative Director of women’s haute couture, ready-to-wear and accessories collections since 2016.
In a statement, the Maison said Chiuri had “decided to leave” her position, and expressed their “deepest gratitude to Maria Grazia Chiuri after a wonderful collaboration”.
Of her exit, Chiuri said: “After nine years, I am leaving Dior, delighted to have been given this extraordinary opportunity.
“I would like to thank Monsieur Arnault for placing his trust in me and Delphine for her support.
“I am particularly grateful for the work accomplished by my teams and the Ateliers.
“Their talent and expertise allowed me to realise my vision of committed women’s fashion, in close dialogue with several generations of female artists.
“Together, we have written an impactful chapter of which I am immensely proud.”

Delphine Arnault, Chairman and Chief Executive Officer of Christian Dior Couture, expressed her thanks to Chiuri in the statement.
“I extend my warmest thanks to Maria Grazia Chiuri, who, since her arrival at Dior, has accomplished tremendous work with an inspiring feminist perspective and exceptional creativity, all imbued with the spirit of Monsieur Dior, which allowed her to design highly desirable collections,” she said.
“She has written a key chapter in the history of Christian Dior, greatly contributing to its remarkable growth and being the first woman to lead the creation of women’s collections.”