A liquid droplet ejecting apparatus includes (n+m) nozzle rows in each of which a plurality of nozzles through which liquid droplets are ejected onto a printing medium are arranged; a nozzle row driving data generation portion configured to generate n sets of nozzle row driving data for the (n+m) rows of nozzles each for driving a corresponding one of the (n+m) nozzle rows; and a nozzle row driving data conversion portion configured to convert the generated n sets of nozzle row driving data that are associated with the (n+m) rows of nozzle row driving data into (n+m) sets of nozzle row driving data each of which is associated with a corresponding one of the (n+m) rows of nozzle row driving data.