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Savu Island is located among Sumba and Rote, West Timor, East Nusa Tenggara Province (Figure 1). The Savu Basin extends over an area of 52,000 km2 with maximum water depth of 3470 m (Kartaadiputra et al., 1982, van der Werff, 1995b). The Savu Basin represents a complex forearc basin, situated at the western margin of the Banda Arc, and is affected by late Miocene and late Pliocene collisional events (Hamilton, 1979, Reed, 1985, Karig et al., 1987, van der Werff et al., 1994). The Savu Island occupies an area of great geological complexity and shows the inluence of three distinct structural environments. The data set available for this paper consist of bathymetric map of the Savu Sea and adjacent areas, Free-air gravity profiles across the Savu Basin (based on the data of Udintsev et al, 1975), and the distribution of published seismic reflection lines that we have examined (partly published by Van Weering et al. 1989). Bathymetry data, gravity anomaly data, and seismic data indicate that the faulting and movement of crustal blocks associated with the formation of the rift Savu Rift Basin and the escape of the Sumba Block were conined to the shallower part of the lithosphere probably <, 60 km in depth. Savu Basin is a submarine basin, approximately 3 km depth, and has accumulated great thickness of clastic sediments. The lower part of the sediment has source rock potential, because it is deep enough and has thick overburden for hydrocarbon maturity. The upper part of clastic sediment has hydrocarbon reservoir potential. On the basis of hydrocarbon production in Timor Basin, we suggest Savu Basin has potential hydrocarbon similar to Timor Basin. However, deep drilling exploration in this basin is needed to prove the potential.Keyword : Savu, Frontier Basin, Eastern Indonesia