In Written on the Body, by creating the narrator`s ungendered and unsexed identity, Winterson makes her text open to the reader`s assumption of the narrator`s sexual and gender identity. Thus, this novel has been read, on the one hand, as a lesbian text by those who assume that the narrator is a female and, on the other hand, as a suspicious text colluding with patriarchal and heterosexual values by those who define the narrator as a male. Those readings of the narrator as one of either sex/gender, however, demonstrate how (academic as well as general) readers have been accustomed to the gender-based reading habits in which textual meanings are dichotomously arranged along the lines of sex and gender of characters. Challenging those dualistic "gendered" readings, this paper reads Winterson`s Written on the Body as a queer text which interrogates, troubles, and subverts the heterosexual concepts of narrative, desire, and body without reducing the narrator`s identity to the essentialist sex and gender system. More specifically, this paper examines how the narrator`s ``un-/over-`` determined sexual and gender identity queers the narrative structure of author-character-reader; how the narrator`s queer (fluid) desire is passing and traveling across categorical contours of (homo-/hetero-) sexual desires; how Winterson challenges the concept of a coherent body and queers the concept of body as a hermeneutic text with myriad textual grids which are not coherently mapped by power but randomly inscribed by nomadic desires.