To provide a jack-up method for automobile, with which even an woman can jack up a car body, by eliminating the jack fixing work with an unnatural posture even in any condition, and utilizing the engine driving force and the hydraulic force so as to turn a jack screw and so as to vertically move the jack.

A jack fitting part 1 is provided for fixation under a car body of an automobile. This jack fitting part 1 can be welded for fixation in an automobile manufacturing process, or it can be separately manufactured in the manufacturing process and it can be fixed by bolts at the time of delivery. A jack screw can be rotated by a handle from outside a car body and it can be automatically rotated from inside the car body so as to vertically move a jack.