Abstract: A low profile notebook for holding looseleaf style prepunched notebook paper of the inexpensive lined or blank type commonly used in schools of all levels by students for note taking purposes, in which the notebook comprises front and rear panels articulated to a back panel, with a one piece all plastic notebook paper binder being anchored to the rear panel adjacent and parallel to the back panel and comprising a back piece having a pair of spaced upstanding rectilinear posts adjacent either end of same that are positioned as applied to the notebook to be received in several of the prepunched holes in the paper, and an end flange upstanding from each end of the back piece, with each end flange having a flap articulated to same that is adapted to swing substantially in coplanar relation with the plane of the paper mounting posts to move toward and away from the post adjacent same and each having a snap fit locking means for snap fit locking engagement with the respective posts to releasably bind the paper in t