The purpose of this paper is a study on the complex morpheme of conjugational stem on Uiseong Areal Language in Gyeongsangbuk-do province. The complex morpheme of conjugational stem is a stem which cannot be explained by a single morpheme synchronically. That is, a complex morpheme of conjugational stem is a stem which consists of the lexicalized allomorphs two and over. The lexicalized allomorphs which consist of the complex morpheme are selected by the lexical selection rules. The rules on the syntactic-sementic component are according to the phonological conditions of ending-initial on conjugational words. The complex morpheme of conjugational stem on this areal language is divided into twelve types; /X{p-u}-/, /Xσ(C)V1{p-V1}-/, /X{t-l?}-/, /X{?-l}l?-/, /X{h-E}-/, /Xㅎ{a-E}-/, /X {V1h-V1-E}-/, /X{p",p?}{u-?}-/, /Xs"{i-?}-/, /m?{k-?}-/, /k"?l{h-k} -/, /kat?{?-E}-/.