An automatic analyzer, comprising: a reagent container storage portion for storing a plurality of reagent containers; a memory unit for memorizing reagent information showing the information on a reagent accommodated in the reagent container; a reagent loader which has a plurality of slots into which the reagent containers are insertable, and is adapted to carry the reagent container into the reagent container storage portion and carry the reagent container from the reagent container storage portion; a display unit adapted to display on a single screen a first display area configured by a first area corresponding to a position on the reagent container storage portion at which the reagent container can be placed and a second display area configured by a second area corresponding to a position on the reagent loader at which the reagent container can be placed; and a control unit adapted to change the display state of the first area on the basis of whether the reagent container is placed at a position on the reagent container storage portion corresponding to the first area and the reagent information of the reagent accommodated in the placed reagent container and changes the display state of the second area on the basis of whether the reagent container is placed at a position on the reagent loader corresponding to the second area, characterised in that the control unit is adapted to change the display state of the second area further on the basis of conveyance-state information showing the conveyance state of the placed reagent container, wherein the conveyance-state information includes at least: - one loading state which is the state where the reagent container when being carried into the reagent container storage portion is disposed at the slot, and - an unloading state which is the state where the reagent container when being carried out from the reagent container storage portion is disposed at the slot. a reagent container storage portion for storing a plurality of reagent containers; a memory unit for memorizing reagent information showing the information on a reagent accommodated in the reagent container; a reagent loader which has a plurality of slots into which the reagent containers are insertable, and is adapted to carry the reagent container into the reagent container storage portion and carry the reagent container from the reagent container storage portion; a display unit adapted to display on a single screen a first display area configured by a first area corresponding to a position on the reagent container storage portion at which the reagent container can be placed and a second display area configured by a second area corresponding to a position on the reagent loader at which the reagent container can be placed; and a control unit adapted to change the display state of the first area on the basis of whether the reagent container is placed at a position on the reagent container storage portion corresponding to the first area and the reagent information of the reagent accommodated in the placed reagent container and changes the display state of the second area on the basis of whether the reagent container is placed at a position on the reagent loader corresponding to the second area, characterised in that the control unit is adapted to change the display state of the second area further on the basis of conveyance-state information showing the conveyance state of the placed reagent container, wherein the conveyance-state information includes at least: - one loading state which is the state where the reagent container when being carried into the reagent container storage portion is disposed at the slot, and - an unloading state which is the state where the reagent container when being carried out from the reagent container storage portion is disposed at the slot. - one loading state which is the state where the reagent container when being carried into the reagent container storage portion is disposed at the slot, and - an unloading state which is the state where the reagent container when being carried out from the reagent container storage portion is disposed at the slot.