Daniele Ricciarelli, better known as Daniele da Volterra was a Mannerist Italian painter and sculptor.

He is best remembered for his association with the late Michelangelo. Several of Daniele's most important works were based on designs made for that purpose by Michelangelo. After Michelangelo's death, Daniele was hired to cover the genitals in his Last Judgment with vestments and loincloths. This earned him the nickname Il Braghettone ("the breeches maker").

Daniele Ricciarelli was born in Volterra (in present-day Tuscany). As a boy, he initially studied with the Sienese artists Il Sodoma and Baldassare Peruzzi, but he was not well received and left them. He appears to have accompanied the latter to Rome in 1535, and helped paint the frescoes in the Palazzo Massimo alle Colonne. He then became an apprentice to Perino del Vaga.

From 1538 to 1541 he helped Perino with the painting of frescoes in the villa of Cardinal Trivuzio at Salone, in the Massimi chapel in Trinità dei Monti, and the chapel of the crucifixion in San Marcello al Corso. He was commissioned the painting of a frieze in the main salon of the Palazzo Massimo alle Colonne, with the life of Fabius Maximus.

In Rome he also started working in the circle of Michelangelo and befriended him. Michelangelo used his influence with Pope Paul III to secure Daniele commissions and the post of superintendent of the works of the Vatican, a position he retained until the Pope's death. Michelangelo also provided him with sketches on which Daniele based some of his paintings, especially his series of frescoes in the Orsini chapel in the Trinity College, the commission for which Daniele had received in December 1541.

Later Daniele was commissioned by Paul III to complete the decoration of the Sala Regia. On the death of the pope in 1549 he lost his position as superintendent and the pension to which it entitled him. He then devoted himself chiefly to sculpture.

He died in Rome in 1566. According to Daniele's will, the marble knee of the missing left leg of the Christ from Michelangelo's Deposition was in his possession at the time of his death. Among his pupils was Giulio Mazzoni from Piacenza. Leonardo Ricciarelli was his nephew.