PURPOSE: To improve considerably the processing capacity for measurement by having sample cassettes which hold many vessels contg. specimens and a pipette device which dispenses the specimens in said vessels into reaction tubes transferred to a prescribed position, etc.

CONSTITUTION: An automatic biochemical analysis device has plural pieces of sample cassettes A wherein plural pieces of vessels contg. specimens for measurement by each prescribed amt. are held, a pipette device P which sucks the prescribed amt. of the specimens in the vessels held in the cassettes A and dispenses the same into reaction tubes 40 and a feeder B of a turret type or the like wherein plural pieces of said tubes 40 are held. The treatment capacity for measurement in the automatic biochemical analysis is considerably improved and the reliability for the accuracy of measurement is considerably improved according to the above-mentioned constitution.