A sheet conveying device includes a switchback unit, a first conveying path, a second conveying path, a switching member, and a convey roller. The first conveying path conveys a sheet to the switchback unit. The second conveying path receives the sheet after the conveying direction is switched by the switchback unit. The switching member rotates about a rotation fulcrum axis extending in a sheet width direction so as to switch between a first attitude for guiding the sheet from the first conveying path to the switchback unit and a second attitude for guiding the sheet from the switchback unit to the second conveying path. The convey roller includes a rotation shaft disposed on the same axis as the rotation fulcrum axis of the switching member and has an outer circumference surface protruding more than a sheet guiding surface of the switching member.