A voice recognition device extracts, from a first voice signal of a user, a first string of phonemes included in the first voice signal, extracts, from a second voice signal of the user, a second string of phonemes included in the second voice signal, extracts a string of common phonemes from the first string and the second string, calculates, for each of a plurality of registered keywords, a degree of similarity between a string of phonemes corresponding to the keyword and the string of common phonemes, and selects, among the plurality of keywords, a prescribed number of keywords based on the degree of similarity for each keyword.