A computer-contained binder provided in the disclosure has a document binder and a computer device. The document binder having at least one cover plate and plural parallel folder rings piercing through an edge of the cover plate. The computer device has a main body, a column-shaped battery portion pierced through by all of the parallel folder rings, and a movable arm. The movable arm has two opposite ends, in which one end thereof is fixed on one of the opposite ends of the column-shaped battery portion, and the other end thereof is movably disposed on one side of the main body.