To provide an information providing device, by which a user can acquire only an irreducibly minimum vocabulary dictionary required for speech operation.

In accordance with the transmission request of information from terminal equipment, an information providing part 210 converts a part of a display text character string in designated information into speech vocabulary dictionary data to be used for speech operation and adds these data to information corresponding to the transmission request. Then, the information is transmitted through communication equipment 230 to the terminal equipment. Therefore, the user can acquire only the irreducibly minimum vocabulary dictionary required for the speech operation.