格线纸，是一种印有格子或线条分割页面的纸，如装订成册则称为格线簿。常见类型有单行纸、双行纸、田字格纸、方格纸、绘图纸、原稿纸等。常用于学生作业（经常装订成练习簿）、草稿等文本书写。

Ruled paper (or lined paper) is writing paper that typically consists of horizontal lines meant to separate lines of hand-written text, and vertical lines meant to provide margins or to act as tab stops.

A popular alternative to lined paper is graph paper (square paper or grid paper). It is a grid layout in which horizontal and vertical lines are equally spaced, dividing the page into squares.