PURPOSE:To decrease a storage area and to reduce analysis processing time by representing a connecting state between parts of speech in numerals. CONSTITUTION:The frequency where parts of speech are connected is extracted from an actual data (sentence or the like), a numeral (connection information) calculated from the extracted data is inputted from a connection information input means 11 and the result is stored on a connection table of a connection table storage means 12 with respect to preceding/succeeding parts of speech at each part of speech. In the table, '1' indicates the highest connection possibility and infinity depicts no connection possibility. A connection table retrieval means 13 determines the position of row/column in the connection table depending on the part of speech of a word included in a sentence inputted being an object of analysis to retrieve the connection information with respect to the preceding/ succeeding parts of speech. A part of speech appearance calculating means 14 uses the connection information obtained to calculate the degree of possibility that each part of speech for the connection with parts of speech of preceding/ succeeding words and an erroneous part of speech eliminating means 15 eliminates the part of speech to be discriminated not to be connected to the part of speech therearound.
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