roll stand can pass through the lower cloth path 1a of the third sewing machine 3 and the lower cloth path 2a of the fourth sewing machine 4 therefore a total of five cloths including the cloth c 0 passing through the upper cloth path 1b of the first sewing machine and the cloth c 4 passing through the upper cloth path 2b of the fourth sewing machine 4 are simultaneously subjected to a relay sewing process in the vertically and alternatley overlaid state accordingly the product after relay sewing process by the sewing apparatus in this way has the individual cloths c 0 to c 4 sewn up and down alternately at the side end parts as shown in fig8 in such a sewing apparatus since it is not necessary to plait down the cloths taken into the sewing machines as an example of which the first sewing machine 1 is shown in fig2 the sewing process can be done automatically by taking the cloths c 0 to c 4 from the material rolls r1 r2 by the take out devices 5 6 and delivering the clots to the sewing machine side and by sending these cloths sewn by the sewing machines 1 to 4 further to the next process side by the forward feeding device 7 disposed behind the sewing machines in such a sewing apparatus as shown in fig5 since the upper surface of the partition wall 102ab composing the upper cloth path 1b is position in the same plane as the horizontal plane 101a of the bed 101 while the upper cloth path 1b converges with the lower cloth path 1a composed of the slope 101b of the bed 101 before the needle location p the side end parts of the cloths c.