那莱（สมเด็จพระนารายณ์มหาราช，1629年－1688年），暹罗大城王国国王，因在位期间与西方的密切交往，尤其是与法王路易十四的外交而着称，曾遣使者至法国。但其门户开放政策激怒了国人与贵族集团，那莱王临死前大将帕碧罗阇政变，杀死其宠臣希腊冒险家Constantine Phaulkon并夺取王位。暹罗重新走向锁国。

Narai (Thai:นารายณ์; 16 February 1633 – 11 July 1688) or Ramathibodi III (รามาธิบดีที่ 3) or Ramathibodi Si Sanphet (รามาธิบดีศรีสรรเพชญ) was the king of Ayutthaya from 1656 to 1688 and arguably the most famous Ayutthayan king. His reign was the most prosperous during the Ayutthaya period and saw the great commercial and diplomatic activities with foreign nations including the Persians and the West. During the later years of his reign, Narai gave his favorite – the Greek adventurer Constantine Phaulkon – so much power that Phaulkon technically became the chancellor of the state. Through the arrangements of Phaulkon, the Siamese kingdom came into close diplomatic relations with the court of Louis XIV and French soldiers and missionaries filled the Siamese aristocracy and defense. The dominance of French officials led to frictions between them and the native mandarins and led to the turbulent revolution of 1688 towards the end of his reign. Narai’s reign was also known for the 1662–1664 invasion of Burma, the destruction of the briefly independent port city of the Sultanate of Singgora (1605–1680), and the Siam–England war (1687).