行编辑器（英语：Line editor）是文本编辑器的一种，针对行进行编辑。现在看来当然非常地老式，这种编辑器起源于操作员还使用电传打字机的年代，也就是一个打印机连着键盘，因为没有显示屏，也就无法在文档中移动光标。

行编辑器只能从事最基本的文本输入与输出。输入、编辑、文档显示并不能同步地进行。一般而言，用户无法直接输入文本，而只能在文本终端上通过简要的命令，对已有文档进行添加或编写。命令和文本，以及编辑器的相应输出，会根据他们的输入顺序，从底部开始逐一显示。虽然命令一般会显示被修改的行，但如果要将行连同文档中的上下文一起显示，则需要另外单独的命令。

A line editor is a text editor computer program in which each editing command applies to one or more complete lines of text designated by the user. Line editors precede screen-based text editors and originated in an era when a computer operator typically interacted with a teleprinter (essentially a printer with a keyboard), with no video display, and no ability to navigate a cursor interactively in a document. Line editors were also a feature of many home computers, avoiding the need for a more memory-intensive full-screen editor.