This study is concerned with the names of is sa mai(잇사매) and ham sa mai(함사매). Origins and meanings of these terms were traced and examined. Some significant findings can be summarized as follows : Korean word is sa mai(잇사매) was a compound word. Korean character is (잇) is derived from Chinese character i, and sa mai(사매) in Korean means sleeves 神 in Chinese character. The character ham in Ham sa mai(함사매) is its origin in Chinese : Korean character ham was Korean pronounciation of the Chinese character, han. ham sa mai is a compound word of ham(함) (Korean), (han ) (Chinese) and sa mai(사매) sleeves(Korean). Thus, first characters of is(잇) in is sa mai(잇사매) and ham(함) in ham sa mai(함사매) are originated from Chinese, where as the word sa mai in the end of is sa mai and ham sa mai is pure Korean. Both character i and ham(han, Chinese) in Chinese means a jaw. Thus, both is sa mai(잇사매) and ham sa mai(함사매) means “jawed sleeves”. That is long and wide round sleeves with narraw wrists.