Harassment which was pointed out as an evil behavior in the South Korea industry has become a critical social issue, consequently the Labour Standards Act and the Industrial Safety and Health Act were revised in 2019 to enforce regulations on the prevention and measurement against harassment in the world of work. Since there is no explicit regulation related to it in the Seafarers’ Act, there may be a legal vacancy in the implementation of measures for preventing harassment in ships by shipowners like the Labor Standards Act. The ILO amended the Maritime Labour Convention in 2016 to give the State party and shipowner the responsibility for safety and health to prevent harassment and bullying against seafarers. In addition, the Convention concerning the Elimination of Violence and Harassment in the World of Work, which applies to all workplaces was adopted at the 108th’ General Labour Assembly. As such, internationally, the standards for preventing harassment in the workplace are being strengthened. This paper reviews the domestic laws of South Korea regulating harassment at workplace and the International Labour Standards of the ILO in order to derive improvement measures to prevent and take measures against harassment in ships. Through it, the draft Amendments of the Seafarers’ Act and plans to prevent and countermeasure harassment in ships are suggested.