Sangeang Api (Gunung Api or Gunung Sangeang) is an active complex volcano on the island of Sangeang in Indonesia. It consists of two volcanic cones, 1,949 metres (6,394 ft) Doro Api and 1,795 m (5,889 ft) Doro Mantoi. Sangeang Api is one of the most active volcanoes in the Lesser Sunda Islands. It erupted in 1988 and the island's inhabitants were evacuated. Between its first recorded eruption in 1512 and 1989 it erupted 17 times. It erupted again during December 2012.
The island of Sangeang is part of the Lesser Sunda Islands. It is located northeast of Sumbawa in the Flores Sea, and is 13 kilometers wide with an area of 153 sq km. The earliest document mentioning about the Sang Hyang Api volcano was found in 14th century Majapahit script of Nagarakretagama. "Gunung Api" also appears as the name for the mountain in the first chapter of the novel The Long Journey by Johannes V. Jensen.