To provide an electric response fluid pump producing a practically sufficient pressure.

A boosting unit 10 includes an introduction channel 13 for introducing electric response fluid and having counter walls becoming narrower gradually from the introduction side toward the discharge side, electrodes 15 and 16 provided on the counter walls of the introduction channel 13 while making a predetermined angle, and a narrow channel 14 connected to the discharge side of the introduction channel 13 and boosting the pressure of the conduction channel 13 in the circulation process. A DC power supply 20 applies a DC voltage to the electrodes 15 and 16.