The content of amino acids in Cordyceps kyushuensis compared with the mycelium of Cordyceps sinensis and the stroma of Cordyceps militaris.Results showed that there are about 16 to 18 kinds of Amino Acids in samples.The content of Necessary amino acids are abundant.Percentages respectively are 66.39%,34.48%,46.18%,46.62%,38.96% and 37.38%.Results also showed that both mycelium and stroma of Cordyceps kyushuensis have abundant nourishment and officinal value.