PROBLEM TO BE SOLVED: To provide a biological information processing apparatus capable of achieving easy and effective display control of information that requires careful handling, while reducing a burden on a user, and a control method thereof.SOLUTION: A biological information processing apparatus executes information display on a display device in a first display state in which predetermined specific information of the information to be displayed cannot be visually recognized until it is detected that predetermined specific input is performed to an input device (S101). When it is detected that the specific input is performed to the input device, the biological information processing apparatus executes information display on the display device in a second display state in which at least part of the specific information of the information to be displayed can be visually recognized (S105).SELECTED DRAWING: Figure 7