Michael Bunluen Mansap (Thai: บุญเลื่อน หมั้นทรัพย์; April 2, 1929 – December 2, 2010) was the Roman Catholic bishop of the Roman Catholic Diocese of Ubon Ratchathani, Thailand.
Ordained in 1951, Bunluen Mansap was named bishop of the Ubon Ratchathani Diocese in 1976. Bishop Mansap retired from overseeing the diocese in 2006. He died on December 2, 2010, at Bangkok hospital aged 81 years old.