The Archive of the Museum of Finnish Architecture, open to all, is specialised in modern Finnish architecture. Its collections consist of digital images, black-and-white photographs, slides, original drawings, copies of drawings, documents and models.

The drawings collection includes original drawings, which are mainly acquired through donations. At present it numbers about 500 000 drawings, primarily from the 20th century. The photographic collection includes about 80 000 photos from medieval to contemporary architecture until the 1980s. Material for this collection has been acquired from periodicals, exhibitions and architects themselves. (Later picture material, mainly consisting of digital images. The copyrights are mainly in possession of architects or photographers.) The Museum's slide collection includes 30 000 pictures on both older and contemporary architecture. The Museum also collects models.