Background: Bioleaching of manganese is an industrial method for its recovery from stone which contains PYROLUSITE (Mno2). In this method, the host minerals are analyzed and revived by certain bacteria. The present research has been done in Iran, for the first time, to study the bioleaching of manganese from stone which contains PYROLUSITE.Methods: Different samples of soil & water were collected from different mines of manganese in different regions of Ian. LB medium and Brunner were used to isolate and enrich microorganisms, and then the action of purifying and identifying grown microorganisms performed through biochemical methods. The bioleaching of manganese was done in flask during 30 days, under the best conditions of temperature, aeration and the diameter or thickness of articles in order to select the best conditions and the highest strain. The amount of revived manganese was measured by two methods of spectrophotometric and titration.Results: In the present research, 13 bacteria which revived manganese were isolated including Bacillus, micrococcus, Corynebacterium, Staphylococcus, Serratia, Lactobacillus, and Enterobacter from CheshmeKabud mine in Kermansah. The results of PYROLUSITE mineral bioleaching with particle diameter of 75 microns, under heat treatment of 30°C and moving speed of 180 rpm, during 2, 10 and 30 days indicated that the highest revival of manganese from PYROLUSITE mineral performed after 30 days to the amount of 33% by Mg4 Bacillus bacteria strain.Conclusion: The results obtained from the present investigation indicated that the strains of Bacillus genus have the highest power of reviving in bioleaching of manganese from PYROLUSITE mineral. Also, with the increase of time, the percentage of bioleaching increased in all bacteria in comparison with control ones.