Automatic analyzer

An automatic analyzer comprising

• a reaction line;
• means for transporting a number of reaction vessels arranged on the reaction line with a first pitch, said reaction vessels containing therein test liquids;
• and
• photometering means including a light source for emitting white light, means for dividing the white light into a plurality of light beams having different wavelengths, a plurality of light guides each having incident ends arranged to receive a respective one of said plurality of light beams and exit ends arranged along the reaction line with a second pitch which is different from said first pitch for projecting the light beams onto reaction vessels along measuring optical paths, and a plurality of light detectors each arranged on respective measuring optical paths to receive respective light beams emitted from the exit ends of respective light guides and transmitted through reaction vessels;
• whereby test liquids contained in a plurality of reaction vessels situating at the measuring optical paths are photometered with the aid of said plurality of light beams having different wavelengths in a time sequential manner, while the reaction vessels are moved along the reaction line over the first pitch.