A washing apparatus for a drum is provided to perform conveying, transporting, washing, and moving processes automatically after setting a drum on a first drum conveying unit. A drum washing apparatus(100) includes a first drum conveying unit(200), a first drum transporting unit(300), a washing unit(400), a drum moving unit(500), a second drum transporting unit(600), and a second drum conveying unit. The first drum conveying unit conveys a drum(1) to be washed. The first drum transporting unit holds, raises, and rotates the drum conveyed by the first drum conveying unit. The washing unit washes off foreign substances from the inside of the drum transported by the first drum transporting unit using wash water and a wash brush. The drum moving unit moves the drum washed by the washing unit. The second drum transporting unit holds, rotates, and lowers the drum moved by the drum moving unit. The second drum conveying unit conveys the drum transported by the second drum transporting unit.
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