Ghiyasuddin Bahadur Shah I (Bengali: গিয়াসউদ্দিন বাহাদুর শাহ, Persian: غیاث الدین بهادر شاه) was the son and successor of Sultan Shamsuddin Firoz Shah of the Bengal kingdom of Lakhnauti. He ruled the kingdom as an independent ruler during 1322–1324 CE and as a governor during 1324–1328 CE.