The present invention provides a grafting shear for straight branch shearing, which comprises a first rod body, a second rod body, a first mounting plate, and a second mounting plate. The first rod body is configured with a first pivoting portion, and the front end of the first pivoting portino is extended with a first driving portion and the rear end is extended with a first linking portion. The second rod body is configured with a second pivoting portion pivoted with the first pivoting portion of the first rod body, and the front end of the second pivoting portion is extended with a second driving portion and the rear end is extended with a second linking portion. The first mounting plate is configured with a first connecting portion pivoted with the first driving portion of the first rod body, and the front end of the first connecting portion is extended with a first shearing portion and the rear end is configured with a first guiding portion for mutually guiding the displacement with the second linking portion of the second rod body. The second mounting plate is configured with a second connecting portion pivoted with the second pivoting portion of the second rod body, and the front end of the second connecting portion is extended with a second shearing portion and the rear end is configured with a second guiding portion for mutually guiding displacement with the first linking portion of the first rod body. The first and second driving portions and the first and second linking portions of the first and second rod bodies may simultaneously drive the first and second shearing portions for clamping or opening operations. Thus, the first and second shearing portions of the first and second mounting plates may be used for straight shearing the branches, so that the grafting surfaces of the branches may be tightly attached, so as to achieve the practical benefit of enhancing the grafting survival rate.一種可平直剪切枝幹之接枝剪具,其包含有第一桿體、第二桿體、第一座板及第二座板;該第一桿體設有第一樞轉部,於該第一樞轉部之前端延伸設有第
