The aim of this research are to know 1)Diversty of Ceremonial Plant of Ngaben on Penglipuran Village, Bali based on Tri Mandala Area; 2) Domination Index of Ceremonial Plant of Ngaben on Penglipuran Village, Bali based on Tri Mandala Area; 3) Index of Cultural Significance (ICS) Ceremonial Plant of Ngaben on Penglipuran Village, Bali based on Tri Mandala Area. This research is conducted by collecting Ceremonial Plant of Ngaben exist on every quadrat level of the Mandala. The ploting method being used in this research is stratified random sampling with type of plot is single square plot. The data were analyzed using Shanon – Wienner Index, Simpson Index and ICS Turner Index. The result of the research are as follows: 1) Diversty of Ceremonial Plant of Ngaben on Penglipuran Village, Bali based on Tri Mandala Area considerably high with score of 2,5302; 2) Score of Domination Index of Ceremonial Plant of Ngaben on Penglipuran Village, Bali based on Tri Mandala Area is also high, which is 0,994214; 3) Higher score of ICS were granted by Kelapa (Cocos nucifera) with score 232; Cabai (Capsicum frustecens) with score of 80; Biu (Musa paradisiaca) with score of 70