An apparatus for processing a substrate may include a drying chamber configured to dry at least two divided substrates from an original substrate, the drying chamber may have a drying space where the at least two divided substrates disposed therein. The apparatus for processing a substrate may include a dryness compensation part configured to compensate a difference of drynesses of chemical liquids coated on the at least two divided substrates such that the chemical liquids coated on the at least two divided substrates has a substantially same dryness.