This paper aims to explore how Korean-Chinese bilingual speakers process Korean final ending -ko. Korean-Chinese bilingual speakers from Yanbian participated in the masked priming experiments through a word judgment task. The masked priming experiments were designed to compare the subjects’ response under three different prime-target conditions: Identical Condition, Unrelated Condition, and Test Condition. The participants’ response time in the experiments was statistically analyzed in two different ways: i.e., subject (F1) analyses and item (F2) analyses. The results of both the subject analyses and the item analyses revealed full priming effects, as is usually found in native speakers’ morphological processing. These findings indicate that Chinese-Korean bilingual speakers are sensitive to each combining morpheme of morphologically complex words including Korean final ending -ko and their processing of the words are not dependent upon the lexical storage of the full form.