In the present study, an attempt has been made to produce a high quality medicinal mushroom Cordyceps militaris supplemented with organic Ge. Cordyceps militaris was cultivated in SDAY liquid medium containing yeast extract 10 g, peptone 10 g, glucose 40 g per liter and chrysalis media supplemented with inorganic Ge at 100, 500, 1000, and 5000 ppm concentrations. The greatest organic Ge production of 442.4 ppm/g and 284 ppm/g were observed in SDAY liquid and Chrysalis media cultures supplemented with 100 ppm inorganic Ge respectively. Similarly, 4,509.7 ppm/g and 1,058 ppm/g of organic Ge were obtained from liquid and chrysalis media cultures supplemented with 5,000 ppm and 1,000 ppm inorganic Ge, respectively. In addition, higher concentration of organic Ge was obtained in mycelia than fruiting bodies. These results indicate that the concentration of organic Ge increase with decreasing inorganic Ge concentration in the medium. This is the first report on production of high valuable Cordyceps militaris contained with organic Ge.