Mariotto di Bindo di Biagio Albertinelli (13 October 1474 – 5 November 1515) was an Italian Renaissance painter active in Florence. He was a close friend and collaborator of Fra Bartolomeo.
Some of his works have been described as "archaic" or "conservative"; others are considered exemplary of the grandiose classicism of High Renaissance art. His works from this period all small-scale works executed in a minute, delicate technique and a style derived from the works of Rosselli's main pupil Piero di Cosimo as well as Lorenzo di Credi and Perugino. Like many Florentine painters, Albertinelli was also receptive to the influence of contemporary Flemish painting.
Albertinelli's earliest works include a small triptych of the Madonna and Child with Saints Catherine and Barbara (1500) at the Museo Poldi Pezzoli, Milan, and another triptych of the Madonna and Child with Saints, Angels and Various Religious Scenes at the Musée des Beaux-Arts in Chartres. The several panels with Scenes from Genesis, at the Courtauld Institute in London, Strossmayer Gallery in Zagreb, Accademia Carrara in Bergamo and Harvard Art Museums in Cambridge, probably also date from this period. The Annunciation at the Musée d'Art et d'Histoire in Geneva is signed and dated (1511) by both artists. The partnership was terminated in January 1513, as reported in a document stipulating the division of the workshop's properties.
thumb|middle|250px|The Expulsion of Adam and Eve from Paradise, 1514. Zagreb, Strossmayer Gallery of Old Masters.
According to Giorgio Vasari's Life of Albertinelli, the painter lived as a libertine and was fond of good living and women. Albertinelli reportedly had experienced financial problems and operated a tavern to supplement his income as a painter. At the end of his life he was unable to repay some of his debts, including one to Raphael. His wife Antonia, whom he married in 1506, repaid some of his loans. Among his many students were Franciabigio, Jacopo da Pontormo, and Innocenzo da Imola.