A drive signal adjustment method adjusts a drive signal including a drive pulse to be supplied to a drive element of a liquid ejecting head. The liquid ejecting head includes a nozzle, a pressure generation chamber communicating with the nozzle, and the drive element generating a pressure change in a liquid inside the pressure generation chamber. The drive pulse includes an expansion element, an expansion maintenance element, a contraction element, a contraction maintenance element, and an expansion restoration element. A plurality of test patterns are printed by using adjusting drive pulses including modification values in which either one or both of a time of the contraction maintenance element and a period of the drive pulse are modified. The adjusting drive pulse corresponding to a specific test pattern selected from among the plurality of test patterns set as the drive pulse at the time of printing.