To provide a catch basin that can switch a flow channel and can make drainage less likely to leak from a closed part.SOLUTION: A catch basin 10 comprises: a basin body 11; an inflow cylindrical part 12, a first outflow cylindrical part 13 and a second outflow cylindrical part 14 formed on a side part of the basin body 11; a first invert 15 connecting the inflow cylindrical part 12 and the first outflow cylindrical part 13; a second invert 16 connecting the second outflow cylindrical part 14 and the first invert 15; and a closing member 20 capable of closing one of the first outflow cylindrical part 13 and the second outflow cylindrical part 14. The closing member 20 has: a substantially cylindrical insertion part 41 having a first end part 51a and a second end part 51b inserted into one of the first outflow cylindrical part 13 and the second outflow cylindrical part 14; and a closing plate part 42 provided at the first end part 51a and closing the first end part 51a.SELECTED DRAWING: Figure 3
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