International Baikal Summer School on Physics of Elementary Particles and Astrophysics co-organized jointly by Irkutsk State University and Joint Institute for Nuclear Research was held in a village Bol’shie Koty  (Irkutsk region) on 23-30 July 2009. About 80 physicists from Germany, Italy, Israel, Russia, Serbia and USA participated in the school. The school materials can be found at http://astronu.jinr.ru/school/current