Abstract
Growing needs of reducing energy consumption and enhancing creative thinking brought expanding of men's business wear market into more trendy and casual sector. As fashion trend of men's business wear has changes to casual jackets, there is need to study for the inner structure of casual jacket. The inner structure of casual jackets are different from conventional tailored jackets so that they can provide more comforts, functionality and characteristic style. The purpose of this study is to find out how the inner structure of casual jackets are made up by comparing jackets of various brands. In order to categorize the construction methods, where, how and what kind of lining, interlining, sleeve heads and shoulder pads are applied were studied. Although there are considerable varieties in making up methods, it could be concluded that casual jackets have lighter and less time and labour consuming inner structure, i.e. partial linings, fusible inter-linings, ready made sleeve heads and shoulder pads.