The utility model relates to a diagnostic test device, which comprises an opening, a bottom and a cup body formed by a side wall. The cup body comprises a collection cavity used for receiving collection element and a test cavity for accommodating a test reagent strip; the collection cavity is communicated with the liquid in the test cavity; the diagnostic test device further comprises a cover usedfor sealing the opening of the cup body and connected with the collection element; the cover is provided with a first position and a second position; when the cover is positioned in the first position, the test reagent strip is not tested; and when the cover is positioned in the second position, the liquid sample is transferred from the collection cavity to the test cavity. The diagnostic test device has the advantages that the use is convenient; the collection and test can be finished at one time; the sample can not overflow to pollute the environment; and the safety of an operator can be ensured.