In this study, the influences of agricultural students’ self-efficacy beliefs and test anxiety on their achievement motivation and academic performance were examined. A sample of 466 students from Iranian Colleges of agriculture participated in this study. A questionnaire was used for data collection. Data were analyzed descriptively and inferentially using SPSS/win and AMOS graphic. The findings revealed that self-efficacy beliefs had more effect on motivation to approach success and academic performance than test anxiety. In contrast, test anxiety had more effect on motivation to avoid failure than self-efficacy beliefs. In addition, motivation to approach success had more effect on academic performance than motivation to avoid failure.