PROBLEM TO BE SOLVED: To provide an on-board voice output device, a voice output control method, and a voice output control program that can suppress the arousal lowering of a driver.SOLUTION: A voice output device comprises: an acquisition unit 54 for acquiring an arousal information that represents a degree of an arousal state of a driver 11 of a vehicle 13； and a control unit 50 that controls a voice output unit 31 so as to output a voice using an output unit 56 according to at least one of the predetermined frequency, condition, and contents for stimulating the sympathetic nerve of the driver 11 when the degree of the arousal state presented by the arousal information acquired by the acquisition unit 54 indicates a degree of an arousal lowering state.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2019,JPO&INPIT【課題】運転者の覚醒度の低下を抑制することができる、車載音声出力装置、音声出力制御方法、及び音声出力制御プログラムを得る。【解決手段】音声出力装置は、車両１３の運転者１１の覚醒状態の度合いを表す覚醒度情報を取得する取得部５４と、取得部５４が取得した覚醒度情報が表す覚醒状態の度合いが、覚醒度低下状態を示す度合いである場合、運転者１１の交感神経を刺激するための予め定められた頻度、予め定められた調子、及び予め定められた内容の少なくとも１つに応じて音声を出力部５６により音声出力部３１から出力させる制御を行う制御部５０と、を備える。【選択図】図６
