The literary critics adhere to a dogmatic ideological perspective when it comes to Kundera and what is missed is the psychological dimension of his writing. This study aims to delve into the psychological core of Milan Kundera's masterpiece, Unbearable Lightness of Being, by drawing on two Lacanian concepts, big Other and object petit a. Kundera's characters get entangled in suspension as their encounters with their reified big Other and object petit a lead them to the different trends of subjectivities. In Franz's case, in regard with big Other, Franz replies to his reified big Other, Sabina, but, at last, he works under the illusion of fate. Moreover, considering object petit a, his involvement with the mother image as the object petit a embodied in his wife pushes him into respecting her, not desiring her. In Tomas's case, his immense obsession with objet petit a in his mistresses makes him a perfect instance of Lacanian ‗hysterical subject'. Regarding the object petit a Tomas sees in Tereza, his tendency to destroy her with his affairs indicates his true love for her. Furthermore, Tomas acts like a reified big Other for Tereza and she surrenders to his desires in order to overcome her own impotency to desire.