PROBLEM TO BE SOLVED: To provide a vehicle arousal degree detection device and a vehicle alarm device using the same which can detect reduction in an arousal degree of a driver at an early stage.SOLUTION: The vehicle arousal degree detection device comprises: visual line detection means 12, 21 which detects a visual line location of a driver of a vehicle 1 and arousal degree determination means 20 which determines that an arousal degree of the driver is low when the visual line location of the driver detected by the visual line detection means 12, 21 is lower than a reference position.COPYRIGHT: (C)2013,JPO&INPIT【課題】早期に運転者の覚醒度の低下を検出することができるようにした、車両の覚醒度検出装置及びこれを用いた車両の警報装置を提供する。【解決手段】車両1の運転者の視線位置を検出する視線検出手段12,21と、視線検出手段12,21により検出された運転者の視線位置が基準位置よりも低下すると運転者の覚醒度が低下していると判定する覚醒度判定手段20とを備える。【選択図】図1