A liquid applicator suitable for manufacturing probe arrays comprises a liquid ejection section having a plurality of sets of a liquid ejecting nozzle adapted to eject liquid onto a medium, a liquid containing section communicating with the liquid ejecting nozzle and a supply port for supplying liquid to the liquid containing section, a liquid supply section having a liquid supply member arranged therein to store liquid to be applied and adapted to supply liquid to the liquid ejection section by way of the supply ports, an information recording body arranged at the liquid ejection section and/or the liquid supply member of the liquid supply section and an information reading device adapted to read information recorded in the information recording body.