There is provided an adjustment method of a recording head which adjusts a landing position of an ink droplet in a printer including the print head, in which a plurality of nozzles are arranged and which performs printing by using the ink droplet to be ejected while relatively moving in a scanning direction (relative movement direction) with respect to a roll paper. The adjustment method of the recording head includes reading a pattern image by dots formed by the ejected ink droplets and calculating a tendency of a spatial positional relationship between each nozzle and a dot corresponding to each nozzle based on the read pattern image, and in which the landing position of the liquid droplet ejected from each nozzle 131 is adjusted based on the tendency calculated in the calculating the tendency of the spatial positional relationship.