An automatic analysis device comprising: a reagent container loading portion having an opening through which a reagent container is adapted to be introduced into the device; a reagent container transport tool having arranged radially thereon a plurality of reagent container insertion slots, the reagent container transport tool being configured to be movable up and down; a refrigerator having in its upper portion an opening that allows the reagent container transport tool to pass therethrough, the refrigerator being adapted to cool a plurality of reagent containers; and an elevating and lowering mechanism configured to elevate or lower the reagent container transport tool, wherein: the reagent container loading portion has a plurality of guide grooves arranged radially on its lower surface in front of the opening, each guide groove being adapted to guide a reagent container, and the plurality of radially arranged guide grooves communicate with the respective reagent container insertion slots arranged radially on the reagent container transport tool at an elevated position, and characterized in that the reagent container transport tool has a shielding member above the plurality of reagent container insertion slots, and the shielding member is adapted to block the opening of the reagent container loading portion when the reagent container transport tool is at a lowered position, and open the opening of the reagent container loading portion when the reagent container transport tool is at an elevated position. a reagent container loading portion having an opening through which a reagent container is adapted to be introduced into the device; a reagent container transport tool having arranged radially thereon a plurality of reagent container insertion slots, the reagent container transport tool being configured to be movable up and down; a refrigerator having in its upper portion an opening that allows the reagent container transport tool to pass therethrough, the refrigerator being adapted to cool a plurality of reagent containers; and an elevating and lowering mechanism configured to elevate or lower the reagent container transport tool, wherein: the reagent container loading portion has a plurality of guide grooves arranged radially on its lower surface in front of the opening, each guide groove being adapted to guide a reagent container, and the plurality of radially arranged guide grooves communicate with the respective reagent container insertion slots arranged radially on the reagent container transport tool at an elevated position, and the reagent container loading portion has a plurality of guide grooves arranged radially on its lower surface in front of the opening, each guide groove being adapted to guide a reagent container, and the plurality of radially arranged guide grooves communicate with the respective reagent container insertion slots arranged radially on the reagent container transport tool at an elevated position, and characterized in that the reagent container transport tool has a shielding member above the plurality of reagent container insertion slots, and the shielding member is adapted to block the opening of the reagent container loading portion when the reagent container transport tool is at a lowered position, and open the opening of the reagent container loading portion when the reagent container transport tool is at an elevated position.