A linear sensor apparatus for a vehicle includes a housing which includes an accommodation space therein, a mobile member which is provided in the accommodation space and has at least a part that extends from the housing outward to be connected to a predetermined driving system of the vehicle and linearly moves between a first area and a second area according to driving of the driving system, a magnet member provided in the mobile member, and an output unit which outputs an OFF value when the magnet member is located in the first area and outputs an ON value when the magnet member is located in the second area.