The jiegu (; Wade-Giles: chieh2-ku3; pinyin: jiég?; sometimes translated as "wether drum"; also written as ) was a drum used in ancient China. It was hourglass-shaped and played with two wooden sticks.
The jiegu was adopted from the Central Asian region of Kucha during the Tang Dynasty, and became a popular instrument for dancing, particularly among nobles. Emperor Xuanzong of Tang (reigned 712-756) was known as a skilled player of the instrument. A Korean instrument derived from the jiegu called the galgo is still occasionally used in Korea. In Japan, the kakko is also derived from the jiegu, and is still used in gagaku music.