It is very human that one sometimes feels dissatis fied with the relationship that he or she has in life, the same thing also happens in Heartbreak House. In Heartbreak House, there are two couples who experience inharmonious relationships. Those couples are Hector and Hesione Hushabye, Alfred Mangan and Ellie Dunn. Both couple are not satisfied with their relationship. That is why the thesis writer is curious know why those two couples are unhappy with their relationships. In order to find the reasons of these inharmonious relationship, the thesis writer will use the theory of conflict, because through the conflict, the thesis writer is able to find out the reasons of the inharmonious relationship. Through the analysis, the thesis writer finds out that the unfulfilled expectation from each of the main character towards their partners brings them to their inharmonious relationship. The thesis writer also finds that the lack of communication and the lack of love between each other make them cannot accept their partner's weaknesses.