A conveyance system comprising: a storage case configured to store a plurality of substrates such that the stored substrates are vertically spaced apart from each other; a lifting/lowering apparatus configured to lift and lower the storage case to position each substrate stored in the storage case to a receiving position sequentially; a handover apparatus configured to receive the substrate at the receiving position, and hand over the substrate at a handover position; a conveying apparatus configured to receive the substrate at the handover position, and convey the substrate, the conveying apparatus including a pair of conveying belts each extending in a conveying direction and provided such that the conveying belts are arranged side by side and spaced apart from each other in a predetermined direction, a plurality of support members associated with each other and provided on the pair of conveying belts, respectively, and a conveying unit configured to drive the pair of conveying belts such that the plurality of support members associated with each other move together in the conveying direction; and a space-restricting mechanism (17, 17A) configured to restrict space between the pair of conveying belts in the predetermined direction, wherein the support members, which are associated with each other and which are provided on the pair of conveying belts, respectively, are configured to: support outer edges of the substrate that has been handed over at the handover position in a state where the space-restricting mechanism is not narrowing down the space between the pair of conveying belts in the predetermined direction; and when the space-restricting mechanism narrows down the space between the pair of conveying belts in the predetermined direction such that space between the support members associated with each other is narrowed down, position the supported substrate to a prescribed position on the support member. a storage case configured to store a plurality of substrates such that the stored substrates are vertically spaced apart from each other; a lifting/lowering apparatus configured to lift and lower the storage case to position each substrate stored in the storage case to a receiving position sequentially; a handover apparatus configured to receive the substrate at the receiving position, and hand over the substrate at a handover position; a conveying apparatus configured to receive the substrate at the handover position, and convey the substrate, the conveying apparatus including a pair of conveying belts each extending in a conveying direction and provided such that the conveying belts are arranged side by side and spaced apart from each other in a predetermined direction, a plurality of support members associated with each other and provided on the pair of conveying belts, respectively, and a conveying unit configured to drive the pair of conveying belts such that the plurality of support members associated with each other move together in the conveying direction; and a pair of conveying belts each extending in a conveying direction and provided such that the conveying belts are arranged side by side and spaced apart from each other in a predetermined direction, a plurality of support members associated with each other and provided on the pair of conveying belts, respectively, and a conveying unit configured to drive the pair of conveying belts such that the plurality of support members associated with each other move together in the conveying direction; and a space-restricting mechanism (17, 17A) configured to restrict space between the pair of conveying belts in the predetermined direction, wherein the support members, which are associated with each other and which are provided on the pair of conveying belts, respectively, are configured to: support outer edges of the substrate that has been handed over at the handover position in a state where the space-restricting mechanism is not narrowing down the space between the pair of conveying belts in the predetermined direction; and when the space-restricting mechanism narrows down the space between the pair of conveying belts in the predetermined direction such that space between the support members associated with each other is narrowed down, position the supported substrate to a prescribed position on the support member. support outer edges of the substrate that has been handed over at the handover position in a state where the space-restricting mechanism is not narrowing down the space between the pair of conveying belts in the predetermined direction; and when the space-restricting mechanism narrows down the space between the pair of conveying belts in the predetermined direction such that space between the support members associated with each other is narrowed down, position the supported substrate to a prescribed position on the support member.