To provide a repairing member for a drain trap, which enables the drain trap to be easily and rapidly repaired.

In this repairing member 20 for the drain trap 11, a cylindrical rising part 14, which is connected to a drain pipe and protruded to the inside of a trap body 13, is provided in the center of the bottom part of the bowl-shaped trap body 13 having an upper part equipped with an opening 12; and a cover body 22, which is formed of a flexible synthetic resin for coating an inner peripheral surface of the trap body 13, and a rising cover part 23, which is formed of a rigid synthetic resin for coating inner and outer peripheral surfaces protruding into the trap body of the rising part 14, are integrally formed, and bonded to the drain trap 11 with a caulking agent 21.