| A Private Affair | |
| Native Name: | |
| Director: | Guillaume Nicloux |
| Producer: | Frédéric Bourboulon |
| Cinematography: | Olivier Cocaul |
| Editing: | Guy Lecorne |
| Music: | Éric Demarsan |
| Distributor: | BAC Films |
| Runtime: | 107 minutes |
| Country: | France |
| Language: | French |
| Budget: | $4.6 million[1] |
| Gross: | $2.2 million[2] |
A Private Affair (French: '''Une affaire privée''') is a 2002 French crime mystery thriller film written and directed by Guillaume Nicloux. The film premiered at the Festival du Film Policier de Cognac on 13 April 2002 and was released theatrically in France on 30 April 2002.
François Manéri is a private detective in charge of the whereabouts of a young missing woman, Rachel Siprien. Six months have passed since the disappearance. At the request of the mother of the latter, François took over the business. The multifaceted personality of the young woman draws a complex web between her best friend, Clarisse, her ex-boyfriend, her stepfather, neighbours and those who knew her from near and afar.