To mount a luminaire on a corner part of a wall surface by compris ing a wall surface mounting part to be mounted on a continuous wall surface forming the corner part of the wall surface, and a tool mounting part mounted oppositely to the corner part of the wall surface.

A tool mounting bracket 1 is formed out of a flat plate, and consists of a luminaire mounting part 2 and a wall surface mounting part 3 formed by bending and extending a lower end of the luminaire mounting part 2. The wall surface mounting part 3 is provided with a bent piece 30 formed by bending a free end side, an inner surface of the bent piece 30 is used as a wall surface mounting face, and a through hole 4 is formed on the bent piece 30. The luminaire mounting part 2 consists of a mount basic part 21 adjacent to the wall surface mounting part 3, and a tool mounting part 22 upwardly extending from the mount basic part 21. Whereby a tool can be mounted on a corner part of the wall surface.