This study aimed to explain prospective teachers' anxiety about teaching in relation to their teaching efficacy beliefs and prior teaching experiences. Participants included 27 preservice teachers. Three instruments were used: Student Teacher Anxiety Scale (STAS), Prior Experiences in Teaching Questionnaire (PETQ), and Teachers' Sense of Efficacy Scale (TSES-Short Form). The predictor variables were prior teaching experience, number of teaching methods courses taken, and teaching efficacy, and the criterion variable was teaching anxiety. Correlation analysis demonstrated that teaching anxiety was negatively correlated with teaching efficacy. Regression analyses were carried out to determine the predictors of teaching anxiety. Results indicated that the regression equation of teaching anxiety, including all predictor variables, explained 40 percent of the variation in teaching anxiety. Teaching efficacy was found as the only significant predictor in the equation. (Contains 15 references.) (Author/SM)