A peripheral device includes a body, a carriage, a first feeding assembly, and a second feeding assembly. The carriage and the first and second feeding assemblies are assembled to the body. The first and second feeding assemblies are located at the same side of the body. The carriage moves back and forth along an axial direction. A portion of the first feeding assembly is located on a moving path of the carriage. The first feeding assembly is removably coupled to the second feeding assembly. The first feeding assembly drives the second feeding assembly to move a printing medium into or out of the body. When the carriage is moved to one side of the body, the carriage moves the first feeding assembly away from the second feeding assembly, such that the printing medium is fed into or moved out of the body only by the first feeding assembly.