无衬线体（Sans-serif）专指西文中没有衬线的字体，与汉字等东亚字体中的黑体相对应。与衬线字体相反。

主要可以分为以下几类：

其他常用的无衬线字体还包括Akzidenz Grotesk、Franklin Gothic、Lucida Sans。

在中文中，没有衬线的字体通常称为黑体，这时这个词的范畴和无衬线字体（Sans-serif）是类似的。所以在中文本体中常用“黑体”，在西文中常用“无衬线体”的称呼。

In typography, a sans-serif, sans serif, gothic, san serif or simply sans typeface is one that does not have the small projecting features called "serifs" at the end of strokes. The term comes from the French word sans, meaning "without" and "serif" from the Dutch word schreef meaning "line". Sans-serif fonts tend to have less line width variation than serif fonts.