A fluid ejection device includes: a fluid chamber whose capacity is variable an inlet flow path and an outlet flow path communicating with the fluid chamber a capacity changing unit which changes the capacity of the fluid chamber a fluid supplying unit which supplies fluid to the inlet flow path a fluid ejection opening disposed at an end of the outlet flow path opposite to an end communicating with the fluid chamber a first electrode of a predetermined polarity having a first contact portion disposed at the fluid ejection opening or a component in the vicinity of the fluid ejection opening a second electrode having a polarity different from the predetermined polarity and having a second conductive contact portion a conduction judging unit which judges whether the first electrode and the second electrode are conducted and an operation control unit which controls operation of the capacity changing unit based on judgment result of the conduction judging unit.
