The writers use qualitative research as the design in this study. The data are collected in the form of words and is present in the form of quotes or descriptions. The main source in the novel itself is The girl on the Train by Paula Hawkins, and secondary sources are other related documents such as relevant books, dictionaries, internet browsing, other literary works. In analyzing the data, the writers use objective approach. In brief, this concentrates on the work itself without considering the outer part of the novel such as the social background of the novel. This approach leads the writers to analyse the work only focusing on the work itself, in which how the interrelationship of the elements of the novel have built and formed. The result shows that the conflict occurred the first marriage conflict, and the second marriage conflict caused by the character of the novel The Girl On The Train by Paula Hawkin's namely Tom. A selfish husband who is never satisfied, while the characters involve so that the conflict occurred is Rachel former Tom's wife who could not give a child to Tom, Anna cheates Tom and becomes Tom’s wife and Megan Tom’s second affair. The first marriage conflict occurred between Tom and Rachel because Tom had an affair with the reason Rachel could not provide child. The second marriage conflict occurred between Tom and Anna.