To provide an inkjet printer capable of performing printing by readily ejecting a liquid even when a liquid is of a paste type liquid having a high viscosity such as a resist material.

This printer is equipped with an ejection head 10 that comprises a liquid chamber 14 which is provided to be communicating with a liquid tank 12 and is filled with a liquid 16 for printing, a thin pipe nozzle 18 for ejecting the liquid 16 in the liquid chamber 14, an ejection mechanism 20 for ejecting the liquid 16 from a nozzle hole 22 of the thin pipe nozzle 18, and a negative pressure mechanism 24 for generating a negative pressure in a direction of ejecting the liquid 16 toward the outside of the nozzle hole 22.