A transport vehicle system comprising: a first track (20A, 120, 220) forming a circuit track that circles in an area being one of a plurality of areas; a first transport vehicle configured to travel on the first track (20A, 120, 220) in one direction; a second track (30A, 130, 230) connecting the plurality of areas; a second transport vehicle configured to travel on the second track (30A, 130, 230) in one direction; a first transfer section onto which a conveyed object is delivered from the second transport vehicle and from which the conveyed object is received by the first transport vehicle; and a second transfer section onto which the conveyed object is delivered from the first transport vehicle and from which the conveyed object is received by the second transport vehicle, wherein the area has a first region and a second region, the first track (20A, 120, 220) extends across the first region and the second region, the first transfer section and the second transfer section are arranged in the first region, and a third transfer section, in which the conveyed object is able to be transferred to or from the first transport vehicle, is arranged in the second region, the first track (20A, 120, 220) in the first region is arranged such that the first transport vehicle passes by the second transfer section and the first transfer section in this order in a traveling direction of the first transport vehicle, the second track (30A, 130, 230) in the first region is arranged such that the second transport vehicle passes by the first transfer section and the second transfer section in this order in a traveling direction of the second transport vehicle, and the first transport vehicle and the second transport vehicle respectively travel in the same direction on the first track (20A, 120, 220) and the second track (30A, 130, 230) that are arranged parallel to each other. a first track (20A, 120, 220) forming a circuit track that circles in an area being one of a plurality of areas; a first transport vehicle configured to travel on the first track (20A, 120, 220) in one direction; a second track (30A, 130, 230) connecting the plurality of areas; a second transport vehicle configured to travel on the second track (30A, 130, 230) in one direction; a first transfer section onto which a conveyed object is delivered from the second transport vehicle and from which the conveyed object is received by the first transport vehicle; and a second transfer section onto which the conveyed object is delivered from the first transport vehicle and from which the conveyed object is received by the second transport vehicle, wherein the area has a first region and a second region, the first track (20A, 120, 220) extends across the first region and the second region, the first transfer section and the second transfer section are arranged in the first region, and a third transfer section, in which the conveyed object is able to be transferred to or from the first transport vehicle, is arranged in the second region, the first track (20A, 120, 220) in the first region is arranged such that the first transport vehicle passes by the second transfer section and the first transfer section in this order in a traveling direction of the first transport vehicle, the second track (30A, 130, 230) in the first region is arranged such that the second transport vehicle passes by the first transfer section and the second transfer section in this order in a traveling direction of the second transport vehicle, and the first transport vehicle and the second transport vehicle respectively travel in the same direction on the first track (20A, 120, 220) and the second track (30A, 130, 230) that are arranged parallel to each other.