According to one embodiment, a voice conversation support apparatus includes an input unit, a first determination unit, a second determination unit, a third determination unit, and a scoring unit. The input unit accepts a text data input according to a voice input mode and another input mode. The first determination unit extracts at least one subject keyword representing a current subject from the text data input. The second determination unit estimates a category of a word that can be an answer. The third determination unit calculates a question pair likelihood. The scoring unit calculates a score about a priority of each input mode.