To provide a ball end screwing device for a model easily screwing a ball end for a model to an adjustable rod for a model without a special skill.

This ball end screwing device for a model is composed of a rod fixing base 7 for fixing the adjustable rod for a model, a ball end fixing base 11 with a link turning part 35 for rotating the ball end for a model and a pedestal 13 fixed so as to enable these to move in a sliding style in a longitudinal direction. Then the bases 7 and 11 are fixed to the optional position of the pedestal 13 by a fixing screw part 21 provided for each of them. In addition, as a scale for measuring a screwing quantity is provided at the pedestal 13, screwing and measuring are executed at the same time.