To provide a dripper which enables a fluid volume in a cup to be visually confirmed with the dripper put on the cup while keeping strength and stability.

A dripper 1 includes a filter holding part 10 for holding a filter, and a flange part 20 extending outward from the lower part of the filter holding part 10. The flange part 20 is provided with three space parts 22a, 22b, 22c penetrating the flange part 20 in thickness direction.