A guidance device includes: a magnetic field generation unit configured to generate the magnetic field； a movement mechanism configured to move the magnetic field generation unit in a vertical direction； a rotation mechanism configured to rotate the magnetic field generation unit in a vertical plane including a magnetization direction of the magnetic field generation unit； an input unit configured to input first operation information for changing posture of a capsule medical device； and a control unit configured to: cause the rotation mechanism to rotate the magnetic field generation unit to change the posture of the capsule medical device based on the first operation information； and control the movement mechanism to change a distance between the magnetic field generation unit and the capsule medical device to correct a magnetic attracting force in a vertical direction of the capsule medical device.
