A transport control device comprising: a storage unit configured to store positional information relating to racks included in a plurality of rack groups (51, 52) provided at predetermined intervals, an outer aisle around the rack groups (51, 52), an under-rack aisle under each of the racks, and a rack area in which a rack retrieved from the rack groups (51, 52) by a transport vehicle is placed, and management information for managing the racks; a control unit configured to output a control signal for controlling the transport vehicle based on the positional information and the management information; and a communication unit configured to transmit the control signal to the transport vehicle, wherein each of the rack groups (51, 52) includes a first rack row and a second rack row, the outer aisle includes an outbound passageway, a first return passageway, and a second return passageway (633, 634, 635), the outbound passageway and the first return passageway being in proximity to the first rack row in a predetermined rack group of the rack groups (51, 52), and the second return passageway (633, 634, 635) being in proximity to the second rack row of each of the rack groups (51, 52), and the control unit outputs a first control signal for controlling a travel of the transport vehicle toward a first pickup position corresponding to a first rack included in the rack groups (51, 52), controlling a pickup of the first rack by the transport vehicle, and controlling the travel of the transport vehicle by way of the first or second return passageway (633, 634, 635) from the first pickup position to the rack area, characterized in that the control unit further outputs a second control signal for performing rack sliding once or a plurality of times, wherein in the rack sliding, a second rack previously adjacent to the first rack is transported by the transport vehicle to a vacant space created after transport of the first rack, and the second control signal includes a signal for repeating the rack sliding until the vacant space moves to a position included in the first rack row of the predetermined rack group. a storage unit configured to store positional information relating to racks included in a plurality of rack groups (51, 52) provided at predetermined intervals, an outer aisle around the rack groups (51, 52), an under-rack aisle under each of the racks, and a rack area in which a rack retrieved from the rack groups (51, 52) by a transport vehicle is placed, and management information for managing the racks; a control unit configured to output a control signal for controlling the transport vehicle based on the positional information and the management information; and a communication unit configured to transmit the control signal to the transport vehicle, wherein each of the rack groups (51, 52) includes a first rack row and a second rack row, the outer aisle includes an outbound passageway, a first return passageway, and a second return passageway (633, 634, 635), the outbound passageway and the first return passageway being in proximity to the first rack row in a predetermined rack group of the rack groups (51, 52), and the second return passageway (633, 634, 635) being in proximity to the second rack row of each of the rack groups (51, 52), and the control unit outputs a first control signal for controlling a travel of the transport vehicle toward a first pickup position corresponding to a first rack included in the rack groups (51, 52), controlling a pickup of the first rack by the transport vehicle, and controlling the travel of the transport vehicle by way of the first or second return passageway (633, 634, 635) from the first pickup position to the rack area, characterized in that the control unit further outputs a second control signal for performing rack sliding once or a plurality of times, wherein in the rack sliding, a second rack previously adjacent to the first rack is transported by the transport vehicle to a vacant space created after transport of the first rack, and the second control signal includes a signal for repeating the rack sliding until the vacant space moves to a position included in the first rack row of the predetermined rack group.