A chemical analyzer for measuring a concentration of components of a sample liquid, by mixing the sample liquid with reagents, so as to react the reagents upon the components thereof. The chemical analyzer includes a carrier which is constructed on a substrate and has an introducing portion through which the sample liquid is injected, distributing flow passages for distributing the sample liquid injected from the introducing portion, and plural reactor portions, each holding the sample liquid therein to be mixed with the reagent, thereby to react. A movable driver portion is provided for mounting the carrier thereon, and a reagent charging device is provided for ejecting the reagents, which are different for the respective reactor portions of the carrier. Further, a detector is provided for detecting the components after mixing the reagents with the sample liquid.