To provide a decorative cover which allows appearance design of an opening to be maintained excellently by covering the opening for inserting a horizontal pipe thereinto, and is capable of being attached and removed to the opening with ease.

A decorative cover 1, which covers openings 11a, 12a from outside at a connecting part where an end portion of a horizontal pipe 13, which is inserted into the openings 11a, 12a provided to an outer wall, and a branch pipe 16 which protrudes from a side of a catch basin 15 connected to a down-pipe 14, are connected, comprises a base material 2 which can cover the openings 11a, 12a and a branch pipe supporting tube 3 which protrudes from the base material 2, where the base material 2 and the branch pipe supporting tube 3 are dual partitioned, one end of partitioned surfaces 2a are connected to each other with an opening/closing member 4 and the other end of the partitioned surfaces 2a are left openable/closable for allowing the branch pipe 16 to be introduced into the inside of the branch pipe supporting tube 3, an opening/closing fixing part 5 is provided to the branch pipe supporting tube 3 which can fix the partitioned surface 2a of the base material 2 in a closed state, and the decorative cover 1 can be compressively fixed to the branch pipe 16 held in the branch pipe supporting tube 3 by the opening/closing fixing part 5.