Experimental results on the current-voltage characteristics of a micro-hollow cathode discharge in wide range of helium gas pressure, 1-120 kPa are presented. Using a metal insulator metal sandwiched electrode system with a hole of 0.5 mm in diameter. Obtained relations between reduced current and sustaining voltage were in good agreement with Townsend similarity law. In the case of large ratio of the cathode length to its diameter, hollow cathode effect appeared at low pressures.