A portable magnification angle adjuster for golf putting is proposed. More particularly, in the portable magnification angle adjuster for golf putting, the decrease of the beauty and portability of the magnification angle adjuster due to the protruding of the knob from the casing during the rotation of a knob for the rectilinear movement of a rotation weight is prevented, and the range of the engagement of threads formed to move the rotation weight is limited such that the moving distance of the rotation weight is limited. To this end, the portable magnification angle adjuster includes: a casing; an indication hand; a knob; and a dial; and a rotation weight.