A liquid droplet ejection apparatus comprising a head in which a plurality of ink chambers to which an ink can be supplied are aligned in one or both of an X direction and a Y direction, the liquid droplet ejection apparatus being configured so that liquid droplets can be ejected from nozzles provided in accordance with the ink chambers by applying ejection pulses, and so that printing can be carried out in a print region of a recording medium based on print data, the liquid droplet ejection apparatus further comprising: a flushing device configured to perform a flushing operation for continuously ejecting liquid droplets from the nozzles by applying ejection pulses to the head when the head is present in a non-print region where the printing is not performed; wherein liquid droplet ejection apparatus is configured to operate using an ink containing a dispersion medium and solid particles having higher specific gravity than that of the dispersion medium, a difference between the specific gravity of the dispersion medium and that of the solid particles being 0.2 or more and a content of a material, whose steam pressure at an ordinary temperature is higher than that of water, being 10% or less; and wherein the flushing device is configured in such a manner that an amount of liquid droplets ejected from the nozzle placed at an end portion in an alignment direction becomes larger than an amount of liquid droplets ejected from the nozzle placed in a central portion in the alignment direction so as to forcedly discharge the ink containing the solid particles that are settled in the ink chambers; wherein the head is formed of a plurality of heads having different types of the inks, and the flushing device is configured to increase any one or both of an amount of liquid droplets ejected from the nozzles by the flushing operation and a frequency of performing the flushing operation in the head that uses an ink having the higher specific gravity of the solid particles relative to the dispersion medium beyond the head that uses an ink having the lower specific gravity in the plurality of heads. a flushing device configured to perform a flushing operation for continuously ejecting liquid droplets from the nozzles by applying ejection pulses to the head when the head is present in a non-print region where the printing is not performed; wherein liquid droplet ejection apparatus is configured to operate using an ink containing a dispersion medium and solid particles having higher specific gravity than that of the dispersion medium, a difference between the specific gravity of the dispersion medium and that of the solid particles being 0.2 or more and a content of a material, whose steam pressure at an ordinary temperature is higher than that of water, being 10% or less; and wherein the flushing device is configured in such a manner that an amount of liquid droplets ejected from the nozzle placed at an end portion in an alignment direction becomes larger than an amount of liquid droplets ejected from the nozzle placed in a central portion in the alignment direction so as to forcedly discharge the ink containing the solid particles that are settled in the ink chambers; wherein the head is formed of a plurality of heads having different types of the inks, and the flushing device is configured to increase any one or both of an amount of liquid droplets ejected from the nozzles by the flushing operation and a frequency of performing the flushing operation in the head that uses an ink having the higher specific gravity of the solid particles relative to the dispersion medium beyond the head that uses an ink having the lower specific gravity in the plurality of heads.