Abstract: A hair binder for binding a bunch of long hair includes an elastic hair band, a pair of frames joined at proximal ends thereof for opening and closing relative to each other, the frames forming a circle when closed, a first engaging structure disposed at distal ends of the pair of frames for engaging opposite ends of the band, and a second engaging structure disposed at the proximal ends for engaging intermediate positions of the band when the frames are opened, and releasing the intermediate positions when the frames are closed.