Lakshmana Sena(Bengali: লক্ষ্মণ সেন; reign: 1178–1206), also called Lakshman Sen in modern vernaculars, was the ruler from the Sena dynasty of the Bengalregion on the Indian subcontinent. His rule lasted for 28 years; and extended to much of the eastern regions of the Indian subcontinent, notably Bengal and Biharregions. His reign ended with the invasion of Muhammad bin Bakhtiyar Khilji.
Lakshmana Sena succeeded his father Ballala Sena. The history of his reign can be reconstructed from the epigraphs of his time so far discovered. Besides the writings of Umapati Dhar, Sharan and the book Tabaqt-i-Nasiri is helpful for collecting information about him. He defeated King Jayachandra. The capital city of his kingdom was at Bikrampur. He was interested in literature and wrote due part of Adbhuta Sagara, a book incompletely written by his father.
He established a new calendar era that was used in Bengal and Bihar for at least 400 years. He also founded the prominent medieval city of Lakhnauti.
Historians generally believe Jayadeva was a poet in Lakshmana Sena’s court, though this fact has been contested, especially by the scholars and laypeople of Orissa, who claim the poet as one of their own. He is said to be one of the five jewels (pancharatnas) of Lakshmana Sena’s court.