A manual drug dispenser device comprising: a cassette including a plurality of boxes, the boxes being disposed side by side in a row along a first direction and the boxes being disposed side by side in a column along a second direction crossing the first direction; a first conveyor that receives drugs all at once from the cassette and that conveys the drugs in a first conveying direction along the first direction; and a second conveyor that receives the drugs from the first conveyor and that conveys the drugs in a second conveying direction along the second direction, wherein the first conveyor includes first receiving members, an endless first belt, and a plurality of first mounting members, the first receiving members including a plurality of first compartments provided in a column along the second direction for receiving the drugs from the boxes for one column, the first belt conveying the first receiving members in the first conveying direction, the number of first mounting members being larger than the number of columns of the boxes along the first direction, the plurality of first mounting members allowing the plurality of first receiving members to be removably mounted on the first belt, and wherein the manual drug dispenser device further comprises a first receiving member detecting unit that is provided so as to face a movement path of each first receiving member, the first receiving member detecting unit detecting each first receiving member; a first mounting member detecting unit that is provided so as to face a movement path of each first mounting member, the first mounting member detecting unit detecting each first mounting member; and a first determining unit that determines whether or not the first receiving members are mounted on the first mounting members on the basis of a detection result provided by the first receiving member detecting unit and a detection result provided by the first mounting member detecting unit. a cassette including a plurality of boxes, the boxes being disposed side by side in a row along a first direction and the boxes being disposed side by side in a column along a second direction crossing the first direction; a first conveyor that receives drugs all at once from the cassette and that conveys the drugs in a first conveying direction along the first direction; and a second conveyor that receives the drugs from the first conveyor and that conveys the drugs in a second conveying direction along the second direction, wherein the first conveyor includes first receiving members, an endless first belt, and a plurality of first mounting members, the first receiving members including a plurality of first compartments provided in a column along the second direction for receiving the drugs from the boxes for one column, the first belt conveying the first receiving members in the first conveying direction, the number of first mounting members being larger than the number of columns of the boxes along the first direction, the plurality of first mounting members allowing the plurality of first receiving members to be removably mounted on the first belt, and wherein the manual drug dispenser device further comprises a first receiving member detecting unit that is provided so as to face a movement path of each first receiving member, the first receiving member detecting unit detecting each first receiving member; a first mounting member detecting unit that is provided so as to face a movement path of each first mounting member, the first mounting member detecting unit detecting each first mounting member; and a first determining unit that determines whether or not the first receiving members are mounted on the first mounting members on the basis of a detection result provided by the first receiving member detecting unit and a detection result provided by the first mounting member detecting unit.