Disclosed are a device and a method for analyzing a sample liquid, particularly the ELISA method being very easy, fast, and highly accurate to carry out. According to the invention, a sample liquid and a diluting liquid are fed to several dosing chambers having different volumes such that the sample liquid can be diluted into associated reaction chambers at different dilution ratios in a dilution step. Different liquids can be delivered successively to the reaction chambers by means of a common receiving chamber. The liquids are transferred from the reaction chambers into associated test chambers in order to stop the detection reaction.