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-imperative- proposal-exclamative endings. Children, then, continued the acquisition of non- terminal endings. Non-terminal endings has connective endings and transform- ative 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. 【key words】acquisition, final ending, terminal ending, non-terminal ending