PURPOSE: To provide an electric-trunk wire drop box, for an apartment house, in which the industrialization rate of the apartment house and the quality of its outward appearance can be enhanced.

CONSTITUTION: In an electric-trunk wire drop box 21 for an apartment house, a household power-distribution device 21c which is used to supply electric power to respective households in the apartment house and power-distribution spaces 21d which house branch power-distribution lines, for the respective households, branched from the household power-distribution device 21c are installed inside a box body 21a attached to the outer wall of the apartment house. In the electric-trunk wire drop box 21, the box body 21a is mounted between outer-wall panels 3, 4 as parts on the outer wall of the apartment house.