This study determined the mediating effect of symptoms of anxiety on the relationship between appraisal and teaching competence of teachers in elementary and secondary schools of San Isidro North and South Districts. The descriptive-correlational research design was utilized in this study employing stratified random sampling with 300 sampled teachers. Data collection was made through administration of survey questionnaires. Three sets of adapted survey questionnaires were used and were subjected for content validity and reliability test. The analysis of data was done using the Mean, Pearson-r, Multiple Regression Analysis and Medgraph using Sobel z-test. The results revealed that the level of appraisal and teaching competence of teachers were very high and the level of symptoms of anxiety was high. A positive significant relationship between appraisal and teaching competence, appraisal and symptoms of anxiety, and symptoms of anxiety and teaching competence was proven in the study. Further, the findings showed that symptoms of anxiety played a partial mediation, thus, it cannot fully account on the influence of appraisal towards teaching competence. Although teachers manifested a high level of symptoms of anxiety, still, they showed a very high level of appraisal and a very high level of teaching competence. Moreover, a high level of symptoms of anxiety did not hinder teachers capability to be very highly competent in teaching.