Three ncw species of free-living marine ncmatodes of the genus Bdbolla: Belbolla huanghaiensis sp. nov., Belbolla stenacephalum sp. nov. and Bdbolla earwicki sp. nov. from the Yellow Sea, China, are described and illustrated. Belbo~a huanghaiensis can be separated from other species in the Belbolla genus by the number of oesophageal bulbs (nine), the length of the spicules and gubemacular apophysis, and the size of the two winged precloacal supplements. Be]bolla stenocephalum can be scparated from other species by the number of oesophageal bulbs (eight), the length of the spicules and the structure ofgubemacular apophysis. Betbolla wanoicki sp. nov. is characterizcd by the number of ocsophageal bulbs (seven), reduced prccloacal supplcments and the structure of gubemacular apophysis. A key to thc genus Betbdla is prm, ided to facditate species idcntification. Types arc deposited in the College of Life Science and Technology, Ocean University of China.