The present invention provides a medium conveyance device whose reliability is enhanced. Namely, a roller conveyance section uses support parts to couple together an upper side shaft, which receives a first reaction force produced in accordance with a first contact-pressure force that urges first driven rollers toward first drive rollers, and a lower side shaft, which receives a second reaction force produced in accordance with a second contact-pressure force that urges second driven rollers toward second drive rollers. Because of this, the medium conveyance device of the present invention may cancel out the two reaction forces that cause an upper side guide and a lower side guide to bend in two bank note conveyance paths adjacent to one another.