Loose-leaf binder

The utility model provides a loose-leaf binder, which is composed of a binder body, a binder sheet and a spiral spring pivotally connected, wherein both sides of the binder body are provided with armor plates, the middle part is provided with notches, and the side edges of the binder body are communicated with perforated holes; the binder sheet is pivotally installed in the notches of the binder body, the binder sheet is provided with pivoting holes corresponding to the perforated holes in the binder body and pivotally connected with a supporting rod, the upper end of the binder sheet is provided with a pressing part, and the other end is provided with a binding part; the spiral spring is sheathed with the supporting rod, one supporting foot of the spiral spring is abutted on the inner wall of the binder sheet and the other supporting foot is fastened to the binder body. When the utility model is used, the pressing part of the binder sheet is pressed, the binding part of the front end is opened by the binder sheet with the supporting rod as a shaft, the binder sheet is loosened when document paper inserted into the binder body, the pressing part of the binder sheet is pushed upwards by the supporting feet of the spiral spring, and thus, the document paper can be bound and fixed by the binding part.