His Majesty the King was born on Monday the 5th of December 1927, at Mount Auburn Hospital, in Cambridge, Massachusetts, U.S.A., being the third and youngest child of Their Royal Highnesses Prince and Princess Mahidol of Songkla.
His Majesty attended the Ecole Nouvelle de la Suisse Romande, Chailly sur Lausanne. Later on he moved to the Gymnase Classique Cantonal of Lausanne from where he received his Bachelier s lettres diploma. He then chose to enter Lausanne University to study science, but the sudden death of his elder brother, King Ananda Mahidol, in Bangkok on the 9th of June, 1946, changed the course of his life completely, for the Law of Succession bestowed on him the arduous but challenging function of the Thai Crown. The Government on behalf of the people came to ask the Princess Mother for her other son to be their King. As he had not finished his education, His Majesty decided to go back to Switzerland for another period of study, but this time in the subject of Political Science and Law in order to equip himself with the proper knowledge for government.
Following the completion of his education in Switzerland in the early 1950s, His Majesty returned home to Thailand. In the years following, he began what has become his way of life - traveling throughout the year to the provinces and rural areas of the kingdom to visit his people, talk to them and, perhaps even more important, listen to them. He learns first hand of their needs and their problems and then sets about trying to find a way of giving immediate help; later these problems are studied in depth to find a permanent solution or way of assistance.

Early Life:
On December 5, 1927, a Thai princess gave birth to a son named Bhumibol Adulyadej ("Strength of the Land, Incomparable Power") in a Cambridge, Massachusetts hospital. The family was in the United States because the child's father, Prince Mahidol, was studying for a Public Health certificate at Harvard University.
His mother studied nursing at Simmons College. The boy was the second son for Prince Mahidol and Princess Srinagarindra.
When Bhumibol was a year old, his family returned to Thailand, where his father took up an intership in a hospital in Chiang Mai.
Prince Mahidol was in poor health, though, and died of kidney and liver failure in September of 1929.

مات والده وهو في الثانية من العمر وتولى الحكم بعد ان قتل اخاه الملك باطلاق النار عليه في ظروف غامضة حتى ان البعض يتهمه في مقتله وكان عند ذلك ما يزال في الجامعة وفي سن التاسعة عشره.

يتيم في سن الـ 2