Giovanni Emanuele Bidera (or Bideri) (4 October 1784 – 8 April 1858) was an Italian writer of Albanian and Greek extraction. He is primarily known as the librettist of Gaetano Donizetti's operas Gemma di Vergy and Marino Faliero, but he also wrote many other librettos for lesser known composers as well as plays, essays, books about Naples, and a treatise on acting. Bidera was born in the small Sicilian town of Palazzo Adriano and spent most of his career in Naples. In 1850 he retired to Palermo where he died at the age of 73.