Hyon Sook Choe. 2001. Focus-sensitivity of Sentence Negation and a Movement Approach. Studies In Modern Grammar 23, 33-74. In this paper, I discuss the nature of the focus-sensitivity of sentence negation under a movement approach In Choe (2000), which adopts the following two assumptions: (1) negation is adverbial, negatively modifying either a focus or a quantifier phrase; (2) it moves for checking reasons. While a examining the counter-evidence against a movement approach discussed in the literature, which has been discussed in relation to two problems (the "constituency" problem and the "subjacency" problem), I show that the counter-evidence is apparent and that it in fact constitutes evidence in favor of the movement approach adopted here. During the discussion, I suggest that the notion of negating be understood in terms of the notions of feature negating and syntactic negating; and I show that the present suggestion makes it possible to understand both the nature of the focus-sensitivity of negation and he syntax and the semantics of negation in relation to various kinds of foci and in relation to a quantifier phrase.