The position detection apparatus is provided comprising: an acquisition section that acquires a magnetic field pattern from a detection target apparatus comprising a detection unit having a plurality of magnetic sensor sections and a moving unit configured to provide the magnetic field pattern corresponding to the position with respect to the detection unit to the plurality of magnetic sensor sections; a reference pattern output section that outputs reference patterns respectively corresponding to each of a plurality of candidate positions of the moving unit with respect to the detection unit; and a detection section that detects which of the plurality of candidate positions is a position of the moving unit with respect to the detection unit based on a result of comparison of the acquired magnetic field pattern and the reference pattern corresponding to each of the plurality of candidate positions.