What is the ultimate condition of the possibility of language? Where is the boundary which separate the linguistic world and the pre-linguistic? How can pre-linguistic elements like noise become human words? Regarding Derrida`s Of Grammatology (1967) and Deleuze`s Logic of Sense (1969) as responses to those ancient questions since Plato and Aristotle, I analyse in this paper two texts so as to make clear the senses of two key concepts, archi-writing and event, which play respectively fundamental role in each book. And I compare two concepts so as to make appear the main points where they converge and diverge. In this work of comparison, I intend finally to show two different philosophical ways of appropriating structuralism and two different ways of post-structuralist philosophy of language.