Abstract: Motivation is the key to learning a second language and one of the most important factors affecting the achievement of language learners. Many studies have exposed that motivation is positively related to success in learning the English language or any other second languages. Learn something maybe can be difficult, if we don’t have motivation. Motivation is an important part when you will try to learn something. Having motivation shows that someone already knows the resolution. The purpose of this research is to find out the factors that contributing to students’ motivation in learning English and the factors that dominate them. This study uses qualitative research that examines 10 students at eighth grade of SMPN 1 West Sungkai academic year 2022/2023. The instruments used was interview. The result of this study indicated that factors contributing to students’ motivation in learning English is intrinsic factors. While, the dominant factors from the intrinsic factors are students’ psychological, students’ physic, students’ ability and ideals and students’ aspiration.