Immunochromatography device and production method thereof, and method for detecting target bacterium using same

An immunochromatographic device for detecting a target bacterium in a sample liquid based on an antigen-antibody reaction detection, comprising:

• (a) a labeling antibody-attached member, to which is attached a labeling antibody, which forms a first complex with an antigen derived from the target bacterium based on an antigen-antibody reaction;
• and
• (b) a chromatographic development member, which contains an immersing region, which is to be immersed in the sample liquid, and a detection region, on which is immobilized a capture antibody, which forms a second complex with the first complex based on an antigen-antibody reaction,
• wherein the immunochromatographic device is configured such that when it is used, the at least portion of the labeling antibody-attached member and the immersing region of the chromatographic development member are both immersed in the sample liquid, and
• wherein the detection of the target bacterium in the sample liquid by the immunochromatographic device is carried out by detecting the second complex captured in the detection region of the chromatographic development member based on the label of the labeling antibody detection.