Side collision determination apparatus for vehicle and high voltage power supply shut-off apparatus

A side collision determination apparatus for a vehicle (10) that includes a side surface including a right side surface and a left side surface, includes: a first acceleration sensor (12) and a second acceleration sensor (14) each of which is mounted on a sensor-mounted position of each side surface and each of which is configured to detect acceleration; and a determination unit (202) which is configured to perform determination whether a level of collision, which has occurred at a part of the side surface, is equal to or higher than a prescribed level. The determination unit performs the determination based on the acceleration detected by a non-collision side one of the first and second acceleration sensors when the part of the side surface at which the collision has been occurred is adjacent to the sensor-mounted position. The determination unit performs the determination based on the acceleration detected by a collision side one of the first and second acceleration sensors when the part of the side surface at which the collision has been occurred is apart from the sensor-mounted position.