Mangsong Mangtsen

Mangsong Mangtsen
མང་སྲོང་མང་བཙན
Tsenpo
King of Tibet
Reign649 – 676
PredecessorSongtsen Gampo
SuccessorTridu Songtsen
Lönchen
BornMang-slon
636
Tibet
Died676 (aged 39–40)
Tsanggi Barnanggang, Tibet (modern Bainang County)
Burial679
Ngozhé Hrelpo Mausoleum, Valley of the Kings
SpouseDroza Trimalö
IssueTridu Songtsen
Regnal name
Tri Mangsong Tsen (ཁྲི་མང་སྲོང་བཙན)
DynastyYarlung dynasty
FatherGungsong Gungtsen
MotherAzhaza Mongjé Trikar
ReligionTibetan Buddhism

Mangsong Mangtsen (Tibetan: མང་སྲོང་མང་བཙན, Wylie: mang srong mang btsan) (636 – 676), also known as Trimang Löntsen or Khri-mang-slon-rtsan, was the 35th King (Tsenpo) of Tibet from 650 to 676. He succeeded to the throne after the death of his grandfather Songtsen Gampo.

As Songtsen Gampo's only son Gungsong Gungtsen had died early, he was succeeded by his infant grandson Mangsong Mangtsen. The political power was left in the hands of the prime minister (Lönchen) Gar Tongtsen.