Microfabrication of a 3×3 micro-plasmajet array with ultra-violet lasers and their thrust performance tests were conducted for nozzle elements with exit height of 0.5 mm and length of 0.5 mm. To evaluate thrust characteristics of the 3×3 arrayed plasmajet, thrust characteristics of the thruster were compared with those of the micro-single-nozzle plasmajet. It was shown that the thrust and specific impulse of the micro-plasmajet array were higher than those of the micro-single-nozzle plasmajet due to the multi-jet effect. The typical values of the thrust, specific impulse and averaged per nozzle element of the 3×3 micro-plasmajet array thruster operated at 6.5W with 1.25 mg/sec of propellant mass flow per nozzle element were 0.77 mN, 62 sec, respectively. In addition, observation of the micro-nozzle discharges was conducted, and a new thruster with extended nozzle structure for which each electrode element was electrically isolated from nearby elements was developed. A preliminary DSMC computation on internal and exhaust nozzle-flow characteristics of micro-nozzles of multi-nozzle array was conducted.