Andrea del Verrocchio, born Andrea di Michele di Francesco de' Cioni, was a sculptor, Italian painter and goldsmith who was a master of an important workshop in Florence. He apparently became known as Verrocchio after the surname of his master, a goldsmith. Few paintings are attributed to him with certainty, but a number of important painters were trained at his workshop. His pupils included Leonardo da Vinci, Pietro Perugino and Lorenzo di Credi. His greatest importance was as a sculptor and his last work, the Equestrian statue of Bartolomeo Colleoni in Venice, is generally accepted as a masterpiece.

Verrocchio was born in Florence in around 1435. His father, Michele di Francesco Cioni, initially worked as a tile and brick maker, then later as a tax collector. Verrocchio never married, and had to provide financial support for some members of his family. He was at first apprenticed to a goldsmith. It has been suggested that he was later apprenticed to Donatello, but there is no evidence of this and John Pope-Hennessy considered that it is contradicted by the style of his early works. It has been suggested that he was trained as a painter under Fra Filippo Lippi. Little is known about his life. His main works are dated in his last twenty years and his advancement owed much to the patronage of Lorenzo de' Medici and his son Piero. His workshop was in Florence where he was a member of the Guild of St Luke. Several great artists like Leonardo da Vinci and Lorenzo di Credi passed through his workshop as apprentices. Beyond this, artists like Domenico Ghirlandaio, Francesco Botticini, and Pietro Perugino were also involved and their early works can be hard to distinguish from works by Verrocchio. Giovanni Santi records that Botticelli, Luca Signorelli, and a young Filippino Lippi also visited or worked in Verrocchio's studio. Of the artist's pedagogy the Florentine poet Ugolino Verino wrote: "Whatever painters have that is good they drank from Verrocchio’s spring".

At the end of his life, Verrocchio opened a new workshop in Venice, where he was working on the statue of Bartolomeo Colleoni, leaving the Florentine workshop in charge of Lorenzo di Credi. He died in Venice in 1488.