PROBLEM TO BE SOLVED: To provide a drunk driving preventive device capable of further restraining electric power consumption.SOLUTION: This drunk driving preventive device is mounted on a vehicle. The drunk driving preventive device includes a travel driving means state detecting means for detecting a state of a travel driving means, a brake pedal operation state detecting means for detecting an operation state of a brake pedal, a drunk state inspection means for inspecting whether or not a driver is a drunk state, and a control means for operating the drunk state inspection means when detecting that the brake pedal is stepped by the brake pedal operation state detecting means by detecting that the travel driving means is stopped by the travel driving means state detecting means.COPYRIGHT: (C)2010,JPO&INPIT【課題】電力消費をより抑制することが可能な飲酒運転防止装置を提供すること。【解決手段】車両に搭載される飲酒運転防止装置であって、走行駆動手段の状態を検出する走行駆動手段状態検出手段と、ブレーキペダルの操作状態を検出するブレーキペダル操作状態検出手段と、運転者が飲酒状態であるか否かを検査するための飲酒状態検査手段と、前記走行駆動手段状態検出手段により走行駆動手段が停止していることが検出され、且つ前記ブレーキペダル操作状態検出手段によりブレーキペダルが踏み込まれていることが検出されたときに、前記飲酒状態検査手段を作動させる制御手段と、を備える飲酒運転防止装置。【選択図】図1