The research work presented here focuses for the development of miniature penning type ion source. One  hollow anode penning type ion source was developed in our laboratory. The size of the ion source is 38mm diameter and55mmlength .The ion source consists of two cathodes,a hollow anode andone piece of rare earth per manent magnet. The plasma was created in the plasmaregion between cathodes and the hollow anode.TheJ × B force in the region helps for efficient ionization of the gas even in the high vacuum region ˜1×10^-5    Torr.The ions were extracted in the axial direction with help of the potential difference between the electrodes and the geometry of the extraction angle.The effect of the extract ion electrode geometry for efficient extraction of the ions from the plasma region was examined. This ion source is a self extracted ion source. The self extracted phenomena reduce the cost and thesize of the ion source.The extracted ion current was measured by a graphite probe.An ion current of more than 200 µA was observed at the probe placed 70 mm  apart from the extraction electrode.In this paper, the structure of the ion source,effect of operating pressure,potentialdifference and the magnetic field on the   extracted ion current is reported