Ekor lotong, ekor lutong, or ekor lutung refers to a kind of traditional Malay blackpowder weapon. It is also known as monkey tail cannon.

The ekor lotong is a kind of relatively small swivel cannon. Typically, ekor lotongs are made of iron. The name "ekor lotong" means "tail of a lotong" refers to the handle on the back of the cannon used to aim the cannon. The handle is usually curved (resembling a monkey tail), and is also made of iron.^[1]