A transportation path diverter that diverts a transportation path such that an article conveyed by an upstream-side conveyor provided on an upstream side of the transportation path is conveyed to a downstream-side upper conveyor disposed above the upstream-side conveyor on a downstream side of the transportation path and a downstream-side lower conveyor disposed below the downstream-side upper conveyor on the downstream side of the transportation path, the transportation path diverter comprising: an upstream-side lower diverting conveyor that is disposed downstream of the upstream-side conveyor and has a downstream side swinging around the upstream-side conveyor; a downstream-side upper diverting conveyor that is disposed above the upstream-side conveyor and the upstream-side lower diverting conveyor and upstream of the downstream-side upper conveyor and has an upstream side swinging around the downstream-side upper conveyor; a downstream-side lower diverting conveyor that is disposed below the downstream-side upper diverting conveyor and upstream of the downstream-side lower conveyor and has an upstream side swinging around the downstream-side lower conveyor, characterized in that the transportation path diverter further comprising: a height detector that detects a conveyed article having at least a predetermined height; and a conveyed article detector that detects an article transferred from the upstream-side lower diverting conveyor to the downstream-side lower diverting conveyor, wherein the upstream-side lower diverting conveyor, the downstream-side upper diverting conveyor, and the downstream-side lower diverting conveyor are swung by different swinging devices (20, 30, 40), and a swing of the downstream-side upper diverting conveyor by the swinging device is controlled based on the detection of the conveyed article by the height detector and the conveyed article detector. an upstream-side lower diverting conveyor that is disposed downstream of the upstream-side conveyor and has a downstream side swinging around the upstream-side conveyor; a downstream-side upper diverting conveyor that is disposed above the upstream-side conveyor and the upstream-side lower diverting conveyor and upstream of the downstream-side upper conveyor and has an upstream side swinging around the downstream-side upper conveyor; a downstream-side lower diverting conveyor that is disposed below the downstream-side upper diverting conveyor and upstream of the downstream-side lower conveyor and has an upstream side swinging around the downstream-side lower conveyor, a height detector that detects a conveyed article having at least a predetermined height; and a conveyed article detector that detects an article transferred from the upstream-side lower diverting conveyor to the downstream-side lower diverting conveyor, wherein the upstream-side lower diverting conveyor, the downstream-side upper diverting conveyor, and the downstream-side lower diverting conveyor are swung by different swinging devices (20, 30, 40), and a swing of the downstream-side upper diverting conveyor by the swinging device is controlled based on the detection of the conveyed article by the height detector and the conveyed article detector.