This study is to plan the interior spaces of cruise ships for domestic services. In order to give directions for planning of interior spaces, a survey was done through questionnaire by Koreans who have experience of travelling on cruise ships. Based on the survey results and other important situations around domestic cruising industry we set up the critical conditions for the interior space design for domestic service cruise ships. And then the data on the cruise ships which have similar conditions with the domestic service cruise ships are analysed. Types and sizes of interior spaces and horizontal and vertical composition of private and public spaces are main concerns in this study.