The term double clarinet refers to any of several woodwind instruments consisting of two parallel pipes made of cane, bird bone, or metal, played simultaneously, with a single reed for each. Commonly, there are five or six tone holes in each pipe, or holes in only one pipe while the other acts as a drone, and the reeds are either cut from the body of the instrument or created by inserting smaller, slit tubes into the ends of the pipes. The player typically uses circular breathing.

The double clarinet is not a clarinet in the modern western sense of the term, since it lacks a register key; in this regard it is more closely related to the chalumeau.

Double clarinets are found primarily in Middle Eastern music, but also in India; there are different versions and names in different countries.

In Yemen, the double clarinet is called a mizmār. This word is used for other types of instruments in other countries.

More common terms are zamr, zammāra, arghūl, and mijwiz (مجوز). The first two of these names have the same linguistic root as mizmār.

In Albania the instrument is called a zumare. It has five holes in each pipe, and a bell.

In Egypt the instrument is known as a zummāra. Both tubes are about 30 to 35 centimetres long; one may have four to six holes while the other has none and acts as a drone, or both can have holes. Its range is very limited, about a fourth.

The arghūl is primarily an Egyptian instrument, having a melody pipe with five to seven holes and a longer drone pipe without holes. It occurs in several sizes. In one specimen the melody and drone pipes are about 80 and 240 centimetres long, respectively, though the drone has removable sections to alter its pitch.