Born 1925 in Bromma, Stockholm.
During the 50s Lennart Arnér worked as a short film creator, with a documentary alignment and experimenting with the pictorial language. He belonged to the circle around The Independent Filmgroup. He made his first film in 1951, Nonsens 51, with Lennart Johansson. Out of Lennart Arnér’s films it is the two experimental and documentary films The Lock and Shrimp trawler that are recognized as his own works. They are, however, regarded as unfinished by The Independent Filmgroup. Lennart Arnér devoted his time to photography and painting during the 60s and 70s, but from 1977 he focused on painting.