Abstract: A combinatory analytical strip including a substrate is disclosed. A first channel for a biochemical assay and a second channel for an immunological assay are provided concavely on an upper surface of the substrate. The results of both assays are detected by a sensor. Each channel includes a first area for receiving a fluid sample, a second area for delivering the fluid sample and a third area where the fluid sample reacts. These three areas are connected successively. A nitrocellulose layer having a hollow-matrix conformation is formed at a bottom of each of the second and third areas of both channels. Each of the nitrocellulose layers of the second areas comprises an average thickness that is not greater than that of each the nitrocellulose layers of the third areas. A reaction material is formed in the hollow-matrix conformation. The third areas of the first and second channels are both located on a line conforming a relative motion path of the sensor and the combinatory analytical strip.