The Benalla affair or Benalla affairs (French: affaire Benalla) are political and judicial cases involving Alexandre Benalla, who served as a security officer and deputy chief of staff to French President Emmanuel Macron.
On the first affair, the newspaper Le Monde identified him on 18 July 2018 in footage as the person who beat up a young protester during the 2018 May Day demonstrations in Paris while impersonating a police officer.
Following the publication of the report, the Paris public prosecutor opened a preliminary investigation on 19 July concerning "violence, usurpation of the functions of a police officer and using signs reserved for public authorities".
On 22 July, Benalla was placed under formal investigation additionally for "concealment of a violation of professional secrecy" and "concealment of the misuse of images from a video surveillance system".
An accomplice, Vincent Crase, was also placed under formal investigation, as well as three police officers for illegally transmitting video surveillance to Benalla.