| Official Name: | Achajur |
| Native Name: | Աչաջուր |
| Pushpin Map: | Armenia#Tavush |
| Mapsize: | 150px |
| Subdivision Type: | Country |
| Subdivision Name: | Armenia |
| Subdivision Type1: | Province |
| Subdivision Name1: | Tavush |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Ijevan |
| Population Footnotes: | [1] |
| Population As Of: | 2011 |
| Population Total: | 4,258 |
| Utc Offset: | +4 |
| Coordinates: | 40.9903°N 45.1453°W |
Achajur (Armenian: Աչաջուր) is a village in the Ijevan Municipality of the Tavush Province of Armenia. The 10th-13th century Makaravank Monastery is located near Achajur.
The village was previously known as Achasu.