AUTOMATIC ANALYZER AND REACTION CONTAINER

PROBLEM TO BE SOLVED: To provide a means and a reaction container to detect the cause of errors in analysis data, such as dirts and bubble, in constant temperature water for keeping temperature constant in the reaction container efficiently. SOLUTION: When the reaction container 5 of the same structure as in the past is used, the reaction container 5 is stopped so that a photometric axis passes through a gap between the reaction containers 5 to measure absorbance when the apparatus is in a standby state. Dirts and bubble in constant temperature water 6 are detected from change in the absorbance data. A train of the reaction containers 5 may be constituted of a material with a constant transmissivity of light through a gap part of the reaction containers 5.