Banville is an outstanding Irish writer. His novel The Sea, which won the British Booker Prize in 2005, tells the story of Morton, a man in his sixties, who fell into depression after his wife died. He left London where he lived with his deceased wife and returned to Ballyless where he spent his childhood with his parents, hoping to find the answer to his life by revisiting his hometown. However, no matter where he hid, he couldnt save himself from emotional difficulties. Starting with the theme of identity anxiety, this paper attempts to analyze the journey of self‐exploration and identity dilemma embodied in the novel.