In this ink jet printer, on the basis of voltage of a nozzle plate 27 at the time that a print head 24 is driven and in a state in which a predetermined potential difference has been generated between the nozzle plate 27 and the inspection area 52, a nozzle inspection is performed so as to confirm whether or not ink is in practice being ejected from each nozzle 23, so that ink can be sequentially ejected to an inspection area 52 from each nozzle. According to the nozzle inspection voltage change is detected in the nozzle plate 27 by a voltage detection circuit 54 provided on an encoder board 64 on a carriage 22. Since both the nozzle plate 27 and the voltage detection circuit 54 are installed on the carriage 22, and the distance between the two of them is shorter, they are less likely be affected by noise. In addition, there is no need to prepare a new board on which the voltage detection circuit 54 needs to be mounted.