己醛糖（英语：Aldohexose）是分子中有醛基的己糖。

D-阿洛糖

D-阿卓糖

D-葡萄糖

D-甘露糖

D-古洛糖

D-艾杜糖

D-半乳糖

D-塔罗糖

果聚糖： 菊粉 · 果聚糖β2→6

甘露聚糖

半乳聚糖

An aldohexose is a hexose with an aldehyde group on one end.

The aldohexoses have four chiral centres for a total of 16 possible aldohexose stereoisomers (2). Of these, only three commonly occur in nature: D-glucose, D-galactose, and D-mannose. The D/L configuration is based on the orientation of the hydroxyl at position 5, and does not refer to the direction of optical activity.