To develop a frame and window frame adjustment method and an adjustment tool capable of execution in a short time working without skill, nice to look at and capable of readjustment.

When a window frame adjustment tool comprising a female member 12 and a male member 11 (11a-11d) screwed with the female member 12 is mounted in a gap between a frame and a window frame 25 and the building frame 23 of a partition part, a large hole 25a on a frame from a building frame and a small hole 25b on a coaxial part from an opening side communicate with each other to continuously be provided, a receiving member and the rotatable male member are turned and moved toward the female member, the female member is driven to the frame through the receiving member of the male member, and fixed on the frame by a plurality of return stopper protruded on the female member. The male member is protruded from the female member by rotating a hexagonal part 11d, the building frame is pressed, a gap with the building frame is adjusted, after adjustment completion, and the receiving member 13 is fixed by a machine screw from the small hole of the opening side of the frame and the window frame.