A transported medium transporting apparatus includes a transported medium transporting device and at least one pressing driven roller. The transported medium transporting device transports a transported medium in a predetermined transportation direction. The pressing driven roller is driven so that the pressing driven roller contacts one surface of the transported medium, which is transported by the transported medium transporting device. The pressing driven roller includes a rotary body and a shaft portion, both of which are made of elastic synthetic resin and formed integrally with each other. A plurality of protrusions are formed on the rotary body at regular intervals in a circumferential direction of the rotary body. The shaft portion rotatably supports the rotary body so that the rotary body can be driven. The pressing driven roller has a shape such that the rotary body contacts the transported medium with a predetermined pressing force owing to an elastic force of the shaft portion.