Specimen container imaging device and specimen processing apparatus

A sample tube imaging device comprising:

• a rack conveyor that transfers a sample rack storing a sample tube in which a sample is put;
• a camera that is provided on a side of the rack conveyor and captures an image of the sample tube on the rack conveyor;
• a light source that is provided on a side of the rack conveyor on the same side as the camera and illuminates the sample tube captured by the camera from above;
• and
• a reflective surface that is located on a side opposite to the sample tube imaged by the camera with respect to an optical axis of the light source and outside a space surrounded by an optical path joining points on an outer shape of a cylindrical portion of the sample tube imaged by the camera and a principal point of the camera,
• wherein the reflective surface folds back light emitted from the light source in a direction away from the sample tube and injects the light to a lower portion of the sample tube from an obliquely upward direction.