A ladder program creation apparatus may include a command listing table storage unit configured to store a command listing table, the command listing table registering standard command information and custom ladder command information, a custom ladder command information creation unit configured to create the custom ladder command information based on an operation by user, and a custom ladder command information storage control unit configured to register the custom ladder command information, which has been created by the custom ladder command information creation unit, and the standard command information in the command listing table.