The hulusi (traditional: 葫蘆絲; simplified: 葫芦丝; pinyin: húlúsī) or cucurbit flute is a free reed wind instrument from China. It is held vertically and has three bamboo pipes which pass through a gourd wind chest; the center pipe has finger holes and the outer two are typically drone pipes. It is not uncommon for a hulusi to have only one drone pipe while the second outer pipe is merely ornamental. The drone pipe has a finger hole, which allows it to be stopped. Advanced configurations have keyed finger holes similar to a clarinet or oboe, which can greatly extend the range of the hulusi to several octaves.
葫芦丝(拼音：hu lu si）是一种从中国吹管乐器。吹奏时手垂直举行，并有三个竹管通过葫芦; 中心管有指孔和两侧是吹奏副管。有些葫芦丝只有一个吹管，而第二个外管仅仅是观赏。主管的后侧有一个需要手指按住的洞，这使得葫芦丝的吹奏能够被随时进行。其他的管孔类似单簧管双簧管，它可以大大延长了几个八度范围内的葫芦丝音域。
The hulusi was originally used primarily in Yunnan province by the Dai and other non-Han ethnic groups but is now played throughout China. Like the related free reed pipe called bawu, the hulusi has a very pure, clarinet-like sound.
Although the hulusi is still predominantly performed in China, it has in recent years been adopted by European composers and performers. Rohan Leach from England, Rapheal De Cock from Belgium and Herman Witkam from the Netherlands have all taken the instrument in new directions.
葫芦丝最初主要用于在云南省的傣族和其他非汉族族群，但现在中国各地流行。如相关的自由簧管巴乌，葫芦丝有一个非常纯净的，单簧管般的声音。虽然仍然主要在中国流行，它近年来已被许多欧洲的作曲家和演奏家如：英国的罗荷兰的Rapheal，来自比利时的赫尔曼进行了全新的演奏。
A similar instrument called hulusheng is a mouth organ with a gourd wind chest。
一种类似的乐器叫做葫芦笙则拥有和口风琴相似的风腔。
