A density correction value determining method of correcting a printing density in a printing apparatus that performs printing by ejecting ink from a plurality of nozzles onto a medium, includes printing a test pattern by ejecting ink from the plurality of nozzles, acquiring captured image data by imaging printed test pattern, calculating a first density correction value for bringing the printing density closer to a predetermined reference value set when one raster is formed by ejecting ink from each single nozzle of the plurality of nozzles based on a density of acquired captured image data, and calculating a second density correction value for bringing the printing density closer to a predetermined reference value set when one raster is formed by combining different nozzles of the plurality of nozzles based on the calculated first density correction value.