In a coating/developing apparatus, a process section includes post-exposure baking units each having a waiting position and configured to perform a baking process on a substrate. An interface section transfer mechanism includes a first transfer mechanism configured to transfer the substrate to and from the process section and to load the substrate into the post-exposure baking units, and a second transfer mechanism configured to transfer the substrate to and from the light exposure apparatus. An interface section includes a relay position configured to place thereon the substrate transferred by the second transfer mechanism, and to allow the first transfer mechanism to receive the substrate therefrom. A control section is arranged to set the substrate on standby at the relay position and the waiting position, to make a time period constant among substrates from an end of the light exposure process to a start of a post-exposure baking process.