A playback processing unit causes a display device to display an endoscopic image recorded in an endoscopic image recording unit. A display time setting unit sets a display time of endoscopic images displayed by the playback processing unit on the display device in the order of imaging. A display time measurement unit measures the display time of each endoscopic image. A time information storage unit stores information related to the display time measured by the display time measurement unit. An acknowledgment unit acknowledges a user operation input. The playback processing unit causes the display device to display the endoscopic image in accordance with the user operation input acknowledged by the acknowledgment unit. The time information storage unit stores information related to a cumulative display time of each endoscopic image.
