To improve discrimination performance and to perform miniaturization.

When a roller 7 for carriage is rotated by a driving motor, locking edges 25b and 26b formed on the inner surface of belt bodies 25a and 26a are fitted to peripheral grooves 22a, 23a and 24a, T-shaped belts 25 and 26 wrapped around T-shaped pulleys 22, 23 and 24 are rotated following the rotation of the roller 7 for carriage and paper sheets held between them are carried. A magnetic head 9 reads the magnetic information of the paper sheets and identifies the kind or the like. Since the T-shaped belt maintains the belt body flat and uniformly presses the paper sheets to the magnetic head over the entire width in a state parallel to the magnetic head, the magnetic information is surely read and read errors are reduced. Since the cross-section area and thickness of the T-shaped belt are small compared to a V belt and it is easily curved, the diameter of the T-shaped pulley is reduced and the whole body is miniaturized.