TRANSFER DEVICE

An overhead hoist transport (OHT) device is provided. The OHT device comprises a plate including a front bolt groove and a rear bolt groove which are extended and opened in a first direction, and a transport unit including a front body and a rear body, placed on the plate, wherein the transport unit comprises a front neck connector disposed on an upper face of the front bolt groove, a rear neck connector disposed on an upper face of the rear bolt groove, a front traveling wheel placed on both sides of the front body, a rear traveling wheel placed on both sides of the rear body, a front position movement drive unit which is connected to the front neck connector by a first connecting bolt passing through the front bolt groove and a rear position movement drive unit which is connected to the rear neck connector by a second connecting bolt passing through the rear bolt groove, and has the same structure as the front position movement drive unit, wherein the front position movement drive unit and the rear position movement drive unit adjust a placement state of the transport unit on the plate, depending on a load distribution state of the front traveling wheel and the rear traveling wheel.