This paper is a preliminary work to newly expand Habermas' theory of public sphere. For this extension, we have found that the concept of 'vulnerability' has played an important role in shaping the new publicness by referring to Horrorism(by Adriana Cavarero). This concept of 'vulnerability' is a concept that defines human universal existence conditions, but it is not a concept that justifies the perfectness of the modern subject and the symmetry between perfect subjects. Rather, by exposing the imperfection of the modern subject, the individual subjects are subject to interdependence through their wounds, while at the same time emphasizing the need to continue melancholy and mourning as they experience their imperfections and hurt others. The concept of vulnerability comes to be the concept of rejection to violence toward the alienated beings. The rejection and discontinuation of these deprived beings present a criticality to existing publicness, so this essay conceptualized the phenomenon of this publicness as critical publicness. Critical publicness is not merely the entry of alienated beings into the existing center, but rather the complete restructuring of the existing publicness, thereby enabling a constant attempt to stop existing violence. Through this, the symmetry of the public sphere is born on the basis of the asymmetry priority, thus this asymmetry justifies that it gave a constant vigor to existing public sphere. In this criticality, privatized beings return to the new public sphere with a new relationship.