La Sen Thai or La Sen Thai Puvanart was the king of Lan Xang from 1486 until 1496. He succeeded his older brother King Souvanna Banlang.^[1]

Laasaenthai was the sixth son of King Sai Tia Kaphut, Governor of Nongkai before his accession. Succeeded on the death of his childless elder brother, 1486. Crowned in 1491. He enjoyed peaceful relations with his neighbours in Vietnam led by Lê Thánh Tông and cultivated good relations with the Ayutthaya Kingdom, spending much of his time contemplating religious and legal matters, furthering the spread of Buddhism and building monuments.^[1] He was succeeded by his only son, Somphou.^[1]