Turkish language learners' motivation is affected by a number of internal and external factors such as the reasons why they learn a language, when and how long they learn it and what happens if they fail to learn it well enough to pass the required tests in a specific time. In Turkey, most university students (if they are not proficient) have to learn a foreign language for at least one year in language schools of the universities they are admitted to. Some of these students receive this language education voluntarily, whereas the others have a compulsory language education; therefore, motivation of the learners towards language learning is highly critical. In this study, success-oriented motivation of students at a language school was investigated in terms of their gender, language levels, faculties, achievement scores, university choice rankings and their willingness to learn a foreign language. 678 students from 10 different faculties of two state universities in Eskisehir participated in this study. The students' motivation of success was measured with "Success Oriented Motivation Scale" and the results revealed that there is a positive and significant relationship between success-oriented motivation and language proficiency scores.