To provide a paper sheet conveying device which receives a paper sheet according to the conveying speed of a pre-processing device, and carries the paper sheet out according to the conveying speed of a post-processing device.

The paper sheet conveying device includes a conveying passage 2 consisting of a large number of conveying roller pairs, and a control unit which detects the position of a paper sheet to be conveyed, and controls the operation of the conveying roller. The conveying passage 2 includes a first half conveying passage 2A and a second half conveying passage 2B. The first half conveying passage 2A has a first half driving mechanism for controlling the rotational speed of a lower conveying roller and a first half vertically moving mechanism for vertically moving an upper conveying roller. The second half conveying passage 2B has a second half driving mechanism for controlling the rotational speed of the lower conveying roller, and a second half vertically moving mechanism for vertically moving the upper conveying roller. The control unit controls the first half driving mechanism, the first half vertically moving mechanism, the second half driving mechanism, and the second half vertically moving mechanism according to the position of the paper sheet to be conveyed.