A medical appliance is easily inserted into a desired blood vessel route. There is provided a guiding-type medical system, including: a cylindrical or linear guidewire made of an elastic body that can be inserted into a blood vessel and a guiding device having a device head portion that can be inserted into a body to guide the guidewire inserted into the blood vessel. The device head portion includes: an ultrasonic array element that can perform an ultrasound scan along one plane to acquire an ultrasound image and a permanent magnet linearly movable in a direction along the one plane. At a distal end of the guidewire, a magnetic head on which magnetic attraction force induced by the permanent magnet is made to act is provided.
