A detecting device packing tray is provided which prevents a detecting device from being contaminated and damaged. The detecting device packing tray includes a tray main body configured to support a detecting device including a detection region to detect a reaction result. The tray main body includes a non-contact groove provided at a position corresponding to the detection region of the detecting device when the detecting device is supported by the tray main body so that the detection region does not contact the tray main body.