A conveyance system 50A of a film-forming apparatus 20A includes a blowing roller 6 having a function of supplying a cooling gas toward a substrate 21. The blowing roller has the first shell 11 and the internal block 12. The first shell 11 has a plurality of first through holes 13 as a gas supply channel, and is rotatable in synchronization with the substrate 21. The internal block 12 is disposed inside the first shell 11. A manifold 14 is defined by the internal block 12 inside the first shell 11. The manifold 14 is formed so as to introduce the gas toward the plurality of first through holes 13 within the range of a holding angle. A clearance 15 facing the plurality of first through holes 13 outside the range of the holding angle is further formed inside the first shell 11. In the radial direction, the manifold 14 has a relatively large dimension, and the clearance 15 has a relatively small dimension.