PROBLEM TO BE SOLVED: To provide a speaking intention recognizing device which can perform accurate recognition even if there are more than one speaking intentions. SOLUTION: A clue morpheme extraction part 11 extracts a clue morpheme having a large relativity to each speaking intention according to corpus data with a correct answer, a decision tree learning part 12 learns to generate a division-point probability decision tree which is divided depending upon attribute values of respective attributes according to the corpus data to determine division point probability, and a decision tree learning part 13 learns to generate a tag candidate probability decision tree which is divided depending upon the attribute values of the prescribed attributes according to the corpus data to determine imparting probability for impart a speaking intention tag. A division- point probability and tag candidate probability imparting part 14 calculates division-point probability and tag candidate probability by referring to the division-point probability decision tree and tag candidate probability decision tree for the morpheme-analyzed character string and an optimum solution search part 15 searches for and outputs the solution for a speaking intention tag having larger product of the two probability values.
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