Classmates have a more important influence as they have a significant impact on child's behaviour and his attitude, performance and success in college. Students spend much time at college; classmates have many things in common such as age, interests, classes and experiences. So, they discuss their impressions, solve problems together, learn their field work, gain new knowledge, experience and even make their own discoveries. Sharing all these makes them closer. In addition, they tend to copy each other's habits and manners, shared their dreams and exciting moments. This paper presents research work about the influence of classmates in college studies period.