确认键（英语：carriage return），常缩写为CR，是指将定位设备重置到文本行首的控制字符或过程，用以把一设备的位置重设到一行字的头。

原本，确认键这术语用于打字机的板手。若打字机的语言由左至右书写的语言．回车用于将承载装纸滚筒的机架（carriage）移到最右边，以便令印字位置对准一行的开头，同时顺便转动滚筒，换至下一行。第一个有动力的回车功能是是在1960年由Smith Corona加入电打字机中，此键一般会标示为carriage return或return。

若是针对非英语系国家的键盘，确认键会用↵（U+21B5、↵）符号表示，如此可以在直接用图像方式说明此键的功能。

A carriage return, sometimes known as a cartridge return and often shortened to CR, <CR> or return, is a control character or mechanism used to reset a device's position to the beginning of a line of text. It is closely associated with the line feed and newline concepts, although it can be considered separately in its own right, as explained further below.