Journal of the International Network for Korean Language and Culture 21-3, 161-195. The purpose of this study is to examine the usage patterns of genitive noun phrases by Thai beginner learners of Korean, with a focus on word order. The genitive noun phrases were categorized into three types: noun combination constructions, determiner combination constructions, and adnominal clause combination constructions. The learners' spoken responses to controlled questions were collected through 1:1 interviews and analyzed. The results revealed that word order errors were most prominent in noun combination constructions. In determiner combination constructions, word order errors occurred only in the case of determiner-prefix combinations. As for adnominal clause combination constructions, error patterns varied depending on the sentence structure. However, more errors were attributed to a lack of understanding of cleft sentence structures rather than word order issues. These findings confirm that the degree of influence of word order differs according to the type of construction when using genitive noun phrases. (Mahasarakham King Sejong Institute)