Giovanni Battista Trotti (1555 – 11 June 1612) was an Italian painter of the late-Renaissance period, active mainly in Piacenza, Parma, and his native city of Cremona. In Cremona, he was initially a pupil of Bernardino Campi, whose niece he married. He painted in the Palazzo dei Giardino in Parma. He painted a Crucifixion in the Cremona Cathedral; while in San Pietro, he painted a Santa Maria Egiziaca (St. Mary of Egypt). He painted the Beheading of John the Baptist for San Domenico at Cremona, and in San Francesco and Sant'Agostino at Piacenza. He was employed by the court of Parma, along with Agostino Carracci; and Agostino found Trotti disagreeable on which account he acquired the name of II Malosso (bad bone).