欧洲货币单位（European Currency Unit），简称ECU（/eky/、 /ɛkʊ/或 /əː'siː'uː），符号为₠，是欧元形成以前欧共体成员国共同采用的计量单位。

The European Currency Unit (₠ or ECU, French pronunciation: ​[eky]) was a basket of the currencies of the European Community member states, used as the unit of account of the European Community before being replaced by the euro on 1 January 1999, at parity. The ECU itself replaced the European Unit of Account, also at parity, on 13 March 1979. The European Exchange Rate Mechanism attempted to minimize fluctuations between member state currencies and the ECU. The ECU was also used in some international financial transactions, where its advantage was that securities denominated in ECUs provided investors with the opportunity for foreign diversification without reliance on the currency of a single country.