The currency used in Indonesia is the rupiah, which is divided into 100 sen. The rupiah is a relatively stable currency, and it can be exchanged for other major currencies such as the US dollar or the euro at official banks and money changers throughout the country. Overall, the economy of Indonesia has been growing steadily over the past several years, making it an attractive place for both investors and tourists. Whether you're traveling for business or pleasure, be sure to keep some rupiah with you when exploring this amazing country!