A sheet conveyer device, including a roller to convey a sheet by rotating in a normal direction and a holder rotatably arranged on a roller shaft, is provided. The holder includes a roller gear system arranged on the roller shaft and having a roller driving gear to drive the roller, a shutter rotatably arranged on a shutter shaft to restrict access of the sheet to the roller, a shutter gear system to connect a path between the roller gear system and the shutter, a one-way clutch to disconnect the path between the roller gear system and the shutter when the roller rotates in the normal direction, and a torque limiter to allow the roller to rotate in a reverse direction. The holder rotates about the roller shaft in the same reverse direction as the roller when the roller rotates in the reverse direction.