An uncertified battery replacement countermeasure apparatus for an electric vehicle , the electric vehicle comprising an electric motor arranged as at least a part of a drive unit for driving of vehicle driving wheels and driven by an electric power from a replaceable battery , the uncertified battery replacement countermeasure apparatus comprising: a battery propriety judgment means (6; S13 to S15) for judging whether a post-replacement battery is a battery certified to the electric vehicle or a battery uncertified to the electric vehicle ; and a power output restricting means for restricting a power output of the drive unit while permitting driving of the drive unit when it is judged that the post-replacement battery is the battery uncertified to the electric vehicle by the battery propriety judgment means (6; S13 to S15), characterized in that: the electric vehicle further comprises an electric auxiliary equipment configured to be actuated by an auxiliary power source , the auxiliary power source is provided separately from the replaceable battery and is configured to be charged with an electric power from the replaceable battery , the electric auxiliary equipment is an electric parking lock device driven by an electric power from the auxiliary power source to allow the vehicle driving wheels to come into a parking lock state, and the power output restricting means is configured to restrict the power output of the drive unit when the auxiliary power source is in a non-chargeable state due to a defect in the replaceable battery , in accordance with a reduction of the state of charge of the auxiliary power source by applying a specific configuration of drive unit output restriction corresponding to the reduction of the state of charge of the auxiliary power source among configurations of drive unit output restriction corresponding to the reduction of state of charge of the auxiliary power source . a battery propriety judgment means (6; S13 to S15) for judging whether a post-replacement battery is a battery certified to the electric vehicle or a battery uncertified to the electric vehicle ; and a power output restricting means for restricting a power output of the drive unit while permitting driving of the drive unit when it is judged that the post-replacement battery is the battery uncertified to the electric vehicle by the battery propriety judgment means (6; S13 to S15), the electric vehicle further comprises an electric auxiliary equipment configured to be actuated by an auxiliary power source , the auxiliary power source is provided separately from the replaceable battery and is configured to be charged with an electric power from the replaceable battery , the electric auxiliary equipment is an electric parking lock device driven by an electric power from the auxiliary power source to allow the vehicle driving wheels to come into a parking lock state, and the power output restricting means is configured to restrict the power output of the drive unit when the auxiliary power source is in a non-chargeable state due to a defect in the replaceable battery , in accordance with a reduction of the state of charge of the auxiliary power source by applying a specific configuration of drive unit output restriction corresponding to the reduction of the state of charge of the auxiliary power source among configurations of drive unit output restriction corresponding to the reduction of state of charge of the auxiliary power source . <EOS>