This paper examines the syntax and semantics of noun phrases with numeral quantifiers in Korean. Pointing out the syntactic properties of these noun phrases, I propose their syntactic structure and provide some syntactic motivation for the proposed structure. Also I examine the semantic properties of these noun phrases while pointing out their semantic ambiguities, i.e. cardinal vs. partitive reading of the numeral quantifier. Raising some problems of Y-S Jung (1997)`s analysis, I propose the analysis on the basis of Diesing (1992). Depending on the position of the noun phrases at the LF, they can have different interpretations. Noun phrases and CIPs adjoined to the MP (mood phrase) are mapped to the restrictive clause (R)and the operator (Q), respectively, in the tripartite logical representation. Consequently this gives rise to the presupposition of the existence of the entity denoted by the noun and the partitive reading of the numeral classifier. On the other hand, if the noun phrase with the CIP remains VP internally at the LF, the numeral classifier functions as a cardinality predicate, along with no presupposition of the entity denoted by the noun.