3. The speech recognizing device according to claim 2 , wherein said statistical language model generating means modifies a general statistical language model based on said grammar in order to generate said statistical language model.
2. The speech recognizing device according to claim 1 , further comprising statistical language model generating means for generating a statistical language model to be used for recognizing said speech inputted to an application program by dictation on the basis of a grammar to be used for recognizing speech inputted to the application program in grammar method; and wherein said natural speech recognizing means recognizes said inputted speech by dictation using said statistical language model generated by said statistical language model generating means.