The utility model provides a technology which is capable of judging the truth of an analyzing tool applied in analysis process of test samples so as to guarantee reliability of analysis result. A proposal is as follows: an identifying device which has a reagent pad and is used for identification of the analyzing tool applied in analysis process of the test samples is provided; the analyzing tool further includes a marking part for identification formed by non-visual substances; the identifying device includes an irradiation unit for irradiating lights to the marking part for identification, a light receiver for receiving lights which are emitted by the non-visual substances of the marking part for identification irradiated by the lights generated by the irradiation unit, and an identifying part for identifying the analyzing tool according to light reception result of the light receiver.