Provided is an automatic analyzer capable of simplifying control of a holding unit that holds a plurality of containers having access to an aspiration
nozzle whose position is fixed and that rotates and moves up and down. The automatic analyzer includes an aspiration
nozzle whose position is fixed and that aspirates reaction liquid or
reagent, and a holding unit that holds a plurality of containers accommodating the reaction liquid or the
reagent, and that rotates and moves t up and down. The holding unit holds at least three of the containers, and an angle between adjacent containers is an integer multiple of a predetermined angle. The angle between adjacent containers is an angle between adjacent containers in a circumferential direction and an angle around a rotation center of the holding unit.