A guidance device includes a second magnet for generating the magnetic field, a translation mechanism for translating the second magnet along a vertical direction, a rotation mechanism for rotating the second magnet in a vertical plane including a magnetization direction of the second magnet, an input unit for receiving input of first operation information for changing posture of the capsule medical device, and a control unit for causing the rotation mechanism to rotate the second magnet on the basis of the first operation information to change the posture of the capsule medical device, and controlling the translation mechanism to adjust a distance between the second magnet and the capsule medical device to correct a magnetic attracting force in a vertical direction of the capsule medical device, the magnetic attracting force being caused by the second magnet rotated by the rotation mechanism.
