To prevent a user from getting bored and to allow him to do proper physical exercise by mixing background video, video related with the user, etc., so as to display on the screen of a display, linking the video related with the user with the actual operation of the user and varying the background video according to the biological function of the user.

With the operation of a start switch 22, CPU 55 of a display control means 5 successively reads the video signals of a scene, a person, a balloon, etc., and a mixing circuit 56 mixes them to display video on a display 57. At the same time, the reception of two-dimensional position information of an operation detecting means 3 and an output from a biological function monitoring means 4 is started. Then, at the time of making a touching action to a balloon, etc., the video of a human body is linked with the actual movement based of two-dimensional position information of the means 3. In addition, a pulse measured by the means 4 is inputted to CPU 55 to compare a measured value and a necessary upper-limit reference value with each other to delay the varying speed of scenes and to reduce the appearing frequency of the balloon.