糖脂（英语：Glycolipid），脂的一类，是含有糖基的脂质。由糖的半缩醛羟基通过糖苷键与脂质相连而成。其非脂部分为糖基，脂部分为鞘氨醇或甘油，而且糖脂可根据脂部分的构成而再分为鞘糖脂与甘油糖脂。

糖脂在生物体分布很广，但含量较少。鞘脂类是动、植物的重要组份，在神经系统中含量很高。鞘糖脂分布在膜脂双层的外侧层中，非极性的碳氢长链在外侧脂层中，极性的糖链伸展到胞外水相中。细胞内有极少量糖脂，是合成糖链过程的中间载体。

Glycolipids are lipids with a carbohydrate attached by a glycosidic bond. Their role is to serve as markers for cellular recognition and also to provide energy. The carbohydrates are found on the outer surface of all eukaryotic cell membranes. They extend from the phospholipid bilayer into the aqueous environment outside the cell where it acts as a recognition site for specific chemicals as well as helping to maintain the stability of the membrane and attaching cells to one another to form tissues