Abstract: A paper inserting apparatus comprises a guide bar having a flat guide path containing an upper and a lower surfaces extending parallel to and facing each other for the inserting tape supplied from its source, a tape pusher equipped to the guide bar so as to move slidably thereon within a defined range in the guide path, the tape pusher having an engaging device movable through the guide path for engaging the tape from both the upper and a lower sides by being inserted to the guide path through the upper and lower surfaces, and an elongated flexible elastic sheet or "leaf" which can slide the lower surface of the tape on the guide path and folds and drives the free portion of the tape protruded from the end edge of the guide path so that a portion of the tape is inserted by a defined distance into the sheet area on the upper exposed surface of the top sheet of the stack, reciprocal drive unit operatively connected to the tape pusher for sliding it within the defined range, and a non-return blade provided in th