To provide a travel path searching system by a portable ultrasonic diagnostic device for easily grasping a current position in which a moving object possessing the portable ultrasonic diagnostic device positions and a moved position during moving.

The current position of the moving body is calculated with a current position calculating part 22, and a travel path is calculated with a travel path calculating part 23 generating a path up to a destination in which the moving object moves together with the current position calculated with the current position calculating part 22, which is displayed on an image display means 15 on the basis of map information of a map information data base 40 storing the map information in which the moving object can move.