PROBLEM TO BE SOLVED: To provide a medical device capable of learning the operation of the medical device.SOLUTION: A medical device 100 includes: an operation unit 3 a control unit 21 for causing display means 4 to display ultrasonic information and change a display sate of the ultrasonic information on the basis of an operation performed by using the operation unit 3 and a generation unit 25 for generating time series information including the ultrasonic information, operation contents and/or display control contents and timing information indicating these timings when receiving inputs of the operation contents by the operation unit 3, the display control contents by the control unit 21 and the ultrasonic information.