可转换债券，简称可转债，又作可换股债券，一种金融衍生品，它可以转换为债券发行公司的股票，其转换比率一般会在发行时确定。可转换债券通常具有较低的票面利率，因为可以转换成股票的权利是对债券持有人的一种补偿。因为将可转换债券转换为普通股时，所换得的股票价值一般远大于原债券价值。但是一旦转换成股票就有下跌风险，不再有债券保值特性。

从本质上讲，可转换债券是在发行公司债券的基础上，附加了一份期权，并允许购买人在规定的时间范围内将其购买的债券转换成指定公司的股票。

有些可转换债券到期后要求必须转为股票，这类可转换债券也可以称为必（须）转换债券。

In finance, a convertible bond or convertible note or convertible debt (or a convertible debenture if it has a maturity of greater than 10 years) is a type of bond that the holder can convert into a specified number of shares of common stock in the issuing company or cash of equal value. It is a hybrid security with debt- and equity-like features. It originated in the mid-19th century, and was used by early speculators such as Jacob Little and Daniel Drew to counter market cornering. Convertible bonds are most often issued by companies with a low credit rating and high growth potential.