There is provided a positioning jig capable of reliably adjusting the position The positioning jig includes a shaft including handle attaching portions at one end, a circular support portion at an intermediate portion, the support portion being at right angles to respective threaded holes of the handle attaching portions and including a larger diameter than that of another portion, and an applying portion at the other end; operation handles screwed to the handle attaching portions; and a base member including pins to be fixed to a mounting member, a support hole fitting around the entire periphery of the support portion, and handle fixing portions for regulating movement of the operation handles, wherein the shaft pivots about the support portion as a fulcrum in accordance with screwed amounts of the operation handles to dispose the applying portion at any position in a predetermined plane.