7. The voice recognition device according to claim 5 , said voice recognition device includes an informing unit for informing a user about a candidate which is an object subjected to a trimming process as a sentence to be recognized.
5. A voice recognition device comprising: a voice recognition dictionary creating unit configured to create a voice recognition dictionary from sentences to be recognized; a voice recognition unit configured to perform voice recognition on a voice which is an object to be recognized with reference to said voice recognition dictionary; and a sentence trimming unit configured to, when a candidate for one of said sentences to be recognized has a series of acoustic units whose number exceeds a predetermined number, trim away either an acoustic unit of a portion at which the number of acoustic units exceeds the predetermined number first and subsequent acoustic units or a syllable including said acoustic unit and subsequent syllables from said candidate to define said trimmed candidate as one of said sentences to be recognized.