The purpose of this study was to investigate the effects of cognitive state anxiety , somatic state anxiety, self-confidence, and trait anxiety on athletes' performance in weightlifting in Taiwan. Measuring instruments included the individual demographic information, Competitive State Anxiety Inventory-2 (CSAI-2), and Sport Competition Anxiety Test (SCAT). Subjects distributed 9 Training Centers, high school, and Colleges which included 111 male and 71 female weightlifters in Taiwan (n=182). Pearson correlation coefficient, t-test, and MANOVA were utilized to analyze the data, and the .05 level of significance was used to determine if significantly different. Cognitive state anxiety was positive correlated with somatic state anxiety and trait anxiety. Self-confidence was negatively correlated with cognitive state anxiety, somatic state anxiety, and trait anxiety. There were significant differences between male and female weightlifters in somatic state anxiety and self-confidence; Male weightlifters were more stable in somatic state anxiety and they had higher self-confidence than female weightlifters. There was no significant gender by athletes' status interaction effect on cognitive state anxiety, somatic state anxiety, self-confidence, and trait anxiety. The international athletes' self-confidence was higher than local athletes' self-confidence. However, there were no significant differences between cognitive state anxiety , somatic state anxiety , and trait anxiety among international athletes , national athletes , and local athletes.