A microfilming camera for taking an microimage of a document on a film. The microfilming camera comprises a main mirror disposed beneath a transparent document support for the support thereon of a document to be microfilmed, which main mirror is used to deflect the optical path of a photo-taking system, a side mirror disposed on each side of the space delimited between the document support and the main mirror, and illuminating sources positioned exteriorly of the optical path and disposed in face-to-face relationship with the respective side mirrors.