A voice recognition system and a voice processing system in which a self-repair utterance can be inputted and recognized accurately, as in a conversation in which a human user makes a self-repair utterance. A signal processing unit converts speech voice data into a feature, a voice section detecting unit detects voice sections in the speech voice data, and a priority determining unit selects a voice section that includes a self-repair utterance from among the voice sections according to a priority criterion without using any result of recognizing a speech vocabulary sequence. Priority criteria can include a length of the voice section, signal to noise ratio, chronological order of the voice section as well as speech speed. A decoder calculates a matching score with a recognition vocabulary using the feature of the voice section and an acoustic model.