AIR FLOW DIRECTION REGULATION DEVICE

An air flow direction regulation device includes a plurality of fins turnably supported; an approximately cylindrical housing arranging an operation portion or a gear mechanism for allowing a direction of each of the fins to be regulated; and a case disposing the housing internally. The fin is turnably supported as support points by an outer pivot portion on a housing inner circumferential side and an inner pivot portion on a housing center axis line side, and includes a gear portion provided near the inner pivot portion. The gear mechanism includes a gear integrally rotating with the operation portion through a shaft to engage the gear portion of each fin. The housing includes a flexible shaft support member provided on a housing center axis line, and forming a connection portion fitting into the inner pivot portion of each fin, and a through hole inserting the shaft to pass through.