PURPOSE: To obtain a lightweight apparatus make use of wind force by arranging the apparatus in a space provided by a tower type steering house on the basis of the reduction of a living quarter as making use of a bridge support structure member.

CONSTITUTION: A living quarter 2 is separated from a steering house 3 with a connecting tower 5 between, while bridges 4 are extended to both sides from the steering house 3. A support pillar 6 of the bridge 4 is also used for the shaft of a windmill 7 for constructing a wind-force-using apparatus E1. The wind-force- using apparatus is arranged in a space among a crew's living quarter reduced by the reduction of the number of crews, the steering house, and the bridge for making efficient use of the wind passing through this space. Since the shaft of the windmill can be also used for the bridge support pillar, the apparatus can be reduced in its weight.