A liquid droplet ejection apparatus comprising: a head that includes an ink chamber into which an ink is supplied, a nozzle provided in accordance with the ink chamber, and an energy giving device that drives when at least one drive pulse is applied thereto and gives energy to the ink in the ink chamber, the head performing printing on a print region of a recording medium based on print data by ejecting liquid droplets from the nozzle; and a drive pulse generation device that generates, as the drive pulse, at least one ejection pulse that is used for ejecting the liquid droplets from the nozzle and at least one micro-vibration pulse that micro-vibrates the ink in the ink chamber so as not to eject the liquid droplets from the nozzle, the ink, wherein the ink contains a dispersion medium and solid particles having higher specific gravity than that of a 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, the liquid droplet ejection apparatus comprises a refresh device (107, 108) that is used when the head is present in a non-print region where the printing is not performed, and the refresh device performs a micro-vibration operation that applies the plurality of micro-vibration pulses to the energy giving device such that the solid particles that are settled and aggregated in the ink chamber are brought to a state in which the solid particles can smoothly be dispersed, and an ejection operation that applies the plurality of ejection pulses to the energy giving device after the micro-vibration operation and ejects a liquid droplet amount equal to or greater than a volume of the ink chamber from the nozzle to replace all of the ink in the ink chamber. a head that includes an ink chamber into which an ink is supplied, a nozzle provided in accordance with the ink chamber, and an energy giving device that drives when at least one drive pulse is applied thereto and gives energy to the ink in the ink chamber, the head performing printing on a print region of a recording medium based on print data by ejecting liquid droplets from the nozzle; and a drive pulse generation device that generates, as the drive pulse, at least one ejection pulse that is used for ejecting the liquid droplets from the nozzle and at least one micro-vibration pulse that micro-vibrates the ink in the ink chamber so as not to eject the liquid droplets from the nozzle, the ink, wherein the ink contains a dispersion medium and solid particles having higher specific gravity than that of a 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, the liquid droplet ejection apparatus comprises a refresh device (107, 108) that is used when the head is present in a non-print region where the printing is not performed, and the refresh device performs a micro-vibration operation that applies the plurality of micro-vibration pulses to the energy giving device such that the solid particles that are settled and aggregated in the ink chamber are brought to a state in which the solid particles can smoothly be dispersed, and an ejection operation that applies the plurality of ejection pulses to the energy giving device after the micro-vibration operation and ejects a liquid droplet amount equal to or greater than a volume of the ink chamber from the nozzle to replace all of the ink in the ink chamber.