The invention provides a printer and a conveyance device that are capable of enlarging a suction range of a suction hole. Even if a gap is formed between an end of the medium and the suction hole, suction force for the medium can be ensured, and the effect on ink droplets can be suppressed. A suction hole arranged on a suction pressing printing plate is set to have a shape including a second opening portion (smallest opening portion), the length of the second opening in the width direction crossing the conveying direction of the continuous paper (medium) is shorter than the length of the suction hole on the mounting surface,