A sample analyzer comprising: a plurality of reagent container holders, wherein each reagent container holder includes a reagent container holder body configured to hold a reagent container, and a tilt changing part configured to change a tilt of the reagent container holder body, wherein the tilt changing part is configured to move the reagent container holder body between a first position and a second position at which the reagent container is held at a larger tilt than the reagent container held in the reagent container holder body placed in the first position; a reagent dispenser configured to aspirate a reagent contained in the reagent container held in the reagent container holder body placed in the first position and a reagent contained in the reagent container held in the reagent container holder body placed in the second position; a detector configured to detect a signal for analysis from a measurement specimen containing a sample and the reagent dispensed by the reagent dispenser; and a control unit that analyzes the sample on the basis of the signal detected by the detector, wherein the reagent container is at least one of a first type of reagent container, a second type of reagent container, a third type of reagent container, and a fourth type of reagent container, wherein the second type of the reagent container has a lower height and larger diameter than those of the first type of the reagent container, the third type of the reagent container has a bottom high in its center, and the fourth type of the reagent container has a bottom being high in its periphery, and wherein the reagent container holder body is placed in the first position when holding the first type of the reagent container or the fourth type of the reagent container and is placed in the second position when holding the second type of the reagent container or the third type of the reagent container. a plurality of reagent container holders, wherein each reagent container holder includes a reagent container holder body configured to hold a reagent container, and a tilt changing part configured to change a tilt of the reagent container holder body, wherein the tilt changing part is configured to move the reagent container holder body between a first position and a second position at which the reagent container is held at a larger tilt than the reagent container held in the reagent container holder body placed in the first position; a reagent dispenser configured to aspirate a reagent contained in the reagent container held in the reagent container holder body placed in the first position and a reagent contained in the reagent container held in the reagent container holder body placed in the second position; a detector configured to detect a signal for analysis from a measurement specimen containing a sample and the reagent dispensed by the reagent dispenser; and a control unit that analyzes the sample on the basis of the signal detected by the detector, wherein the reagent container is at least one of a first type of reagent container, a second type of reagent container, a third type of reagent container, and a fourth type of reagent container, wherein the second type of the reagent container has a lower height and larger diameter than those of the first type of the reagent container, the third type of the reagent container has a bottom high in its center, and the fourth type of the reagent container has a bottom being high in its periphery, and wherein the reagent container holder body is placed in the first position when holding the first type of the reagent container or the fourth type of the reagent container and is placed in the second position when holding the second type of the reagent container or the third type of the reagent container.