There is provided a guidance device including a permanent magnet having a shape that allows generation of a magnetic field suitable for guiding a capsule medical apparatus. The guidance device applies a magnetic field to a capsule endoscope 10 within which a first permanent magnet is arranged when the capsule endoscope 10 is introduced into a subject, to guide the capsule endoscope 10 within the subject. The guidance device includes an extracorporeal permanent magnet 25a configured to be disposed outside the subject. The extracorporeal permanent magnet 25a is a second permanent magnet that has a first plane containing a magnetization direction and a first direction orthogonal to the magnetization direction and confines the capsule endoscope 10 within a region facing the first plane. In the extracorporeal permanent magnet 25a, the length in the first direction is longer than the length in the magnetization direction.
