In this paper, the authors describe design of a tri-band antenna based on fractal concepts. Fractal antenna exhibits multiband behavior due to self-similarity in their structure. Plus shaped micro-strip antenna utilizes two substrates of same dielectric material mounted above the other having individual dielectric constant of 4.4 and each of thickness 1.6mm. This antenna is radiating at multiple resonant frequencies. The resultant resonant frequencies obtained are of triple bands i.e. 2.9GHz, 3.2GHz and 3.6GHz for IMT 200 and GSM application.