An apparatus includes first load ports 2A and 2B and second load ports 2C and 2D provided in a left-right direction; a processing unit D2; an inspection module 4 provided between the first load ports 2A and 2B and the second load ports 2C and 2D; a first substrate transfer mechanism 5A provided at one side of the inspection module 4 in the left-right direction, and configured to transfer a substrate W into the processing unit D2 and a transfer container C on the first load ports 2A and 2B; a second substrate transfer mechanism 5B provided at the other side thereof, and configured to transfer the substrate W into the inspection module 4 and a transfer container C on the second load ports 2C and 2D; and a transit unit 51 for transferring the substrate W between the first and the second substrate transfer mechanisms 5A and 5B.