Metallurgical features and mechanical properties of friction stir welded (FS-welded) joints under the combination of 5083, 6N01 and 7N01 alloys of 3 mm thick parent materials by two or three fabricators and four ways of procedures and also difference in these characteristics due to dissimilarities were studied. Shapes and structures of FS-welded zone, and their hardness distribution, etc., were clarified and these profiles were put in order according to these combinations. Some convenient means such as a measure to estimate these profiles were examined. The dissimilarities were clearly reflected in the hardness distributions, and the distributions to be considered suitable were obtained under their specified combinations. Joint efficiencies were obtained of about 100 % in 5083 joints, about 85 % in 6N01 joints except in some joint and about 96 % in 7N01 joints. All of 5083 joints bent till the minimum former diameter of 12 mm. Almost all of 6N01 joints bent till 32 mm but only the specified joint bent till 20 mm. Almost all of 7N01 joints bent till 20 mm but still only the specified joint was no less than 32 mm. Difference due to dissimilarities was recognized partly in the tensile properties and limitedly in the bendability.