To provide a site assembly house for an electric apparatus with which a component such as iron core of a disassembled transport type transformer requiring a long time for carrying-in and largely causing the delay of a site schedule can be carried into the house without opening a roof and using a wrecker or the like.

An openable/closable opening 29, is provided on the side wall of a front room 21, conveyance body structures 22 provided with whist rails 25 are located inside and outside the front room 21 with the opening 29 in-between, and the conveyance body structure 22 located outdoors on the outside of the front room 21 is configured by using a beam 24 having the function of the roof. A whist 26 is arranged in the conveyance body structure 22.