PROBLEM TO BE SOLVED: To provide an indoor plant pot stand with a waste water receiving box for opening a hole on a plant pot tray, passing water through a support pipe, accumulating watering water in the waste water box of a waste water box attaching rack and processing it. SOLUTION: The watering water of a plant pot flows from the tray 1 through the support pipe 2, is accumulated in the waste water receiving box 4 and is processed.