Geoffroy's rousette (Rousettus amplexicaudatus) is a species of megabat or Old World fruit bats.

Geoffroy's rousette occurs throughout Southeast Asia and in the Malesia region of Oceania, in Myanmar, Thailand, Cambodia, Laos, Vietnam, Singapore, Indonesia, the island of Borneo, East Timor, the Philippines, the Solomon Islands, Bismarck Archipelago, and Papua New Guinea.

Like other fruit bats, R. amplexicaudatus has sensitive hearing and sense of smell and good eyesight which helps it to manoeuvre well during flight, specifically at night.

[2] It sometimes has pale yellow tufts of hair on the side of its neck which occur in adult for this species, especially males.

Specimens in the Sabah Museum were collected from coconut plantations on Mantani Island and the highland of Crocker Range, while the one from Sarawak was from Niah Cave.