Solid state physics or condensed matter physics is a branch of modern physics that deals with the physical properties of solid state or condensed phases of matter. Understanding the electrical and magnetic properties of solids is right at the heart of modern society and technology. For example: The entire computer and electronics industry relies on tuning of a special class of material, the semiconductor. New technology for the future will inevitably involve developing and understanding new classes of materials. This course will introduce fundamental concept and physical picture of solid state physics for the first-year graduate student and 3rd- or 4th-year undergraduate student.