Abstract: An automatic analysis apparatus is disclosed which provides for various analytical operations in clinical diagnosis and experiments including measuring the changes in light absorbance of a large number of samples mixed with different reagents in a progressive manner, biochemical, electrolytical, fluorescence, and immunological analysis and EIA analysis of samples in bead solid phase. A plurality of samples are maintained, together with diluents and emergency samples, in an ordered sequence on a sample table rotatably disposed which is rotated by drive means in a stepping manner to move the samples progressively to a predetermined suction position at which a sample pipetter picks up a measured amount of sample and dispenses it to one of a plurality of reaction containers that are arranged in an ordered sequence on a reaction table rotatably disposed, preferably about said sample table.

Abstract: A novel automatic analysis apparatus in which a plurality of reaction tub according to the necessity, are held by a pair of turret tables disposed in predetermined spaces, and a reaction tube exchange means held between the tables automatically exchanges the reaction tubes held by one table for those of the other table at a predetermined position without stopping the rotation of the tables, and thereby achieves a charging operation, a measuring operation and a cleaning operation necessary for analysis of a specimen, such as blood, reagent or the like at a high speed with high precision and, in addition, facilitates measurement of an urgent specimen such as for operation.