A method of controlling an operation of continuously transporting plural printing mediums including a first medium and a second medium to be transported immediately subsequent to the first medium, includes: actuating a first motor to drive a first roller adapted to transport the printing mediums; actuating a second motor to drive a second roller disposed at a downstream side of the first roller and adapted to transport the printing mediums to a printing area at which a printing operation is to be performed on each printing medium; and controlling actuations of the first motor and the second motor so that the second medium is transported to and stopped at a stop position arranged between the first roller and the second roller while performing the printing operation on the first medium.