Um, Hong-Joon. 1999. The Formal Feature Checking of Object. The Journal of English Grammar 3.2, 43-61. The purpose of this paper is to examine the way in which the formal features of Object are checked off within the framework of the Minimalist Program and to unify the process of formal feature checking of Object. Under Chomsky's analysis, the features of Object are checked off at pre- and post-Spell Out: in English lacking overt Object Shift, they are checked off at LF and in German languages undergoing overt Object Shift, they are checked off at the Overt Syntax. This paper, in order to unify Chomsky's checking system, adopts two suggestions: one is that all local relations to a Head H are potentially checking relations with H, and the other is that feature checking may happen in the Merger Operation. If we take these two proposals, formal feature checking of Object occurs automatically in the Merger Operation by which Object is introduced in complement of V. This means that the process of feature checking of Object is not only minimized but also unified. (Chungang University)