Giovanni Battista Ruggieri (died 1640) was an Italian painter of the Baroque period. In 1606 became a pupil of Domenichino. He was also called del Gessi, because later became s pupil of Francesco Gessi. Ruggieri accompanied Gessi to Naples in time of Urban VIII. He was patronized by the Giustiniani family and died in Rome in 1640. His brother Ercole was also educated by Gessi.