Lee, Sam-hyung·Lee, Phil-young·Im, Yoo-jong The purpose of this study is to investigate the process of Korean children’s acquisition of final endings. First, children acquire terminal endings, and the order of terminal endings acquisition is a declarative-interrogative-imperativeproposal-exclamative endings. Children, then, continued the acquisition of nonterminal endings. Non-terminal endings has connective endings and transformative endings, and both seem to appear at the same time. However, during a typical use of non-terminal endings, children acquire connective endings prior to transformative endings. Connective endings have three parts; coordinative endings, subordinate endings and subsidiary endings. The acquisition process of connective endings is in the order of subsidiary-subordinate-coordinative endings. Transformative endings are divided into two; adnominal endings and nominal endings. In transformative endings, the sequence of acquisition is adnominal ending-nominal endings.