1. A translation text inputting apparatus for reading a source text in character string form of expression and a translation text in voice form of expression and converting the translation text to a character string, the apparatus comprising: a source text analysis and bilingual dictionary retrieval module for predicting at least a translation text word composing the translation text, by identifying at least a source text word which composes the source text and retrieving a bilingual dictionary by use of the identified source text word as a key; a phoneme recognition module for converting the translation text in voice form to a lattice of phonemes with a recognition probability exceeding a predetermined value; and, a phoneme to character conversion module for converting the lattice of phonemes outputted by said phoneme recognition module to the character string, wherein a path in the lattice is searched, said path matching the phonemic expression of one of the translation text words predicted by said source text analysis and bilingual dictionary retrieval module and said path being converted to the character string of the matched translation text word.