Disclosed is a substrate processing apparatus and method. The substrate processing apparatus includes a process chamber (10) providing an internal space, in which a process is carried out onto a substrate; a support member (30) installed in the process chamber (10) to support the substrate; and a shower head (20) located above the support member (30) to supply a source gas toward the support member (30), wherein the shower head (20) includes a first injection surface (24) located at a position separated from the upper surface of the substrate by a first distance, and provided with outlets of first injection holes (24a) to inject the source gas; and a second injection surface (26) located at a position separated from the upper surface of the substrate by a second distance being different from the first distance, and provided with outlets of second injection holes (26a) to inject the source gas.