In this paper, experimental results on the generation of low temperature plasma in atmospheric pressure air are presented using a direct current micro-hollow cathode discharge. Stable glow discharge plasma was obtained with hollow electrodes of 0.5mm in diameter and separated by ceramics insulator 1mm in thickness. Under the condition of gas flow rate 12.3l/min, discharge current 18mA and sustaining voltage, 540V, plasma jet about 3mm length was observed in ambient air. Effect of somedischarge condition such as gas flow rate and applying voltage, was investigated to generate cold plasma jet.