Masha Ivashintsova (March 23, 1942 − July 13, 2000) was a Russian photographer from Saint-Petersburg (then Leningrad, USSR) who was heavily engaged in the Leningrad poetic and photography underground movement of the 1960−80s. Masha photographed prolifically throughout most of her life, but she hoarded her photo-films in the attic and rarely developed them. Only when her daughter Asya found some 30,000 negatives in their attic in 2017 did Masha's works become public. In this regard, Masha Ivashintsova's work and story have been compared to those of Vivian Maier.