An inkjet recording apparatus includes a shape reading unit that reads a shape of a conveyed recording medium, a line data generating unit that generates line data based on information of the shape of the recording medium read by the shape reading unit, a head unit that ejects ink to the conveyed recording medium, a mask data generating unit that specifies an ejection inhibition part to which ink is not ejected from each of the plurality of line data, and a print image data generating unit that combines the dot image data and the mask data so as to generate print image data.