The turning arm (30) supports an X-ray generator (10a) and an X-ray detector (21). The moving mechanism (200) includes a turning part (201) that is configured to turn the turning arm (30) and a moving part (202) that is configured to move the turning arm (30) along a two-dimensional plane orthogonal to an axial direction of a turning shaft. A photographic region assignment receiving part (610) is configured to receive an operation to assign a part of a dental arch (90) as a pseudo intraoral radiography region (CA). A main-body control part (60) is configured to control the moving mechanism (200) based on a movement starting signal to move the turning arm (30) to a predetermined photography starting position (L2) corresponding to the pseudo intraoral radiography region (CA). A signal output switch (71) includes a movement starting signal output part (711) is configured to output the movement starting signal to the main body control part (60).
