The present invention provides a liquid jetting device and a conveying method thereof, which can correct the conveying amount at a state with less restriction. The liquid jetting device comprises the following components: an ink jet head used for jetting liquid; a conveying mechanism which conveys the medium to a conveying direction relatively to the ink jet head according to the conveying amount of target; a memory which stores a plurality of corrected values which establish corresponding relationship to the relative positions of the ink jet head and medium, namely the corrected values which are suitable for the corresponding established relationship of the corrected value in the range of the corresponding position of the corrected value; and a controller which corrects the target conveying amount according to the corrected values corresponding with the relative position before conveying, and the corrected value corresponding with the relative position at a state that the range of correlated value corresponding with the relative position before conveying is exceeded when the conveying is executed according to the target conveying amount.