Recently, HAZOP has been used as one of the most effective way of qualitative risk assessment for plant industries. However, this technique requires much man labor to be successfully performed. This fact enables the adequate HAZOP worksheet program to help speeding up the procedure and managing the data of analysis. Based on the experience of HAZOP carrying out, the authors focused the purpose of this study on developing a useful and comfortable HAZOP worksheet program. The unique characteristics of developed program are the menu window expressed in common steps of HAZOP, versatile edit functions, and search menu for investigating the scenario data. The tendency analysis for existing HAZOP results was performed to validate the usefulness of the developed program.