Former army chief Apirat Kongsompong entered the monkhood for one month at Wat Hong Rattanaram on Thursday morning, following his mandatory retirement on Sept 30.
His ordination was a simple ceremony in the presence of his family and the chiefs of the defence forces and police, at the temple in Bangkok Yai district.
Gen Apirat earlier announced he woud enter the monkhood for a month to make merit for King Rama IX, Her Majesty Queen Sirikit The Queen Mother and Their Majesties The King and Queen.
Former national police chief Chakthip Chaijinda was also present, in a safron robe. He was ordained at the temple late last week he also retired.
Gen Apirat was appointed Lord Chamberlain on his retirement.