A substrate processing method comprises: an execution step of executing the first processing for the plurality of substrates, and executing the second processing for the substrates having undergone the first processing; a recovery step of recovering the plurality of substrates having undergone the first processing and the second processing to the retraction chamber; a conditioning step of, after completion of the first processing for the last substrate among the plurality of substrates, loading a dummy substrate into the first processing chamber, executing the third processing for the dummy substrate, and unloading the dummy substrate from the first processing chamber; and a second execution step of, after the dummy substrate is unloaded from the first processing chamber in the conditioning step, loading the substrates recovered in the recovery step into the first processing chamber, and executing the third processing for the substrates loaded into the first processing chamber.