Patent ID: 7846745

Claim:
A device for immunochromatography comprising: a test strip comprising a sample application member, a label holding member configured for holding a labeled ligand against an analyte substance in a sample, and a chromatography membrane carrier comprising a detection site comprising a fixed ligand against the analyte substance; a first case member configured for placement on a first surface side of the test strip and comprising a sample application inlet and first and second protrusions configured to project towards the first surface side of the test strip, wherein the first protrusion is arranged a distance upstream from the second protrusion in a development direction of the sample, and wherein the sample application inlet is arranged upstream from the first and second protrusions in the development direction; and a second case member configured for placement on a second surface side which is a reverse of the first surface side and comprising a third protrusion configured to project towards the second surface side of the test strip, wherein the third protrusion is opposed to the first and second protrusions and has a width in the development direction spanning the distance between the first and second protrusions so that the third protrusion is configured to hold the second surface side of the test strip and the first and second protrusions are configured to hold the first surface side of the test strip when the second case member is attached to the first case member so as to form a case for housing the test strip; wherein the sample application member comprises an overlap region that overlaps a part of the label holding member and a non-overlap region for applying the sample; wherein the sample develops from the non-overlap region of the sample application member to the chromatography membrane carrier through the label holding member; and wherein the first and third protrusions are configured to hold the test strip in the overlap region of the sample application member when the second case member is attached to the first case member.