According to one embodiment, a dialogue support apparatus includes a processing circuitry. The processing circuitry receives input information indicating a user's intention. The processing circuitry determines at least one target dialogue state among dialogue histories related to dialogue states indicating dialogue results between a user and a dialogue system which estimates the user's intention and performs processing in accordance with the user's intention, the target dialogue state being a target of instructions from the user. The processing circuitry acquires a processing result from the dialogue system by inputting the input information and the target dialogue state into the dialogue system. The processing circuitry generates first update information to update a display of the processing result.