The paper has been designed to investigate the effects of anxiety, stress, and task difficulty on the performance of a motor learning. The subjects of the present study are swventy-two players extracted randomly from seven Middle Schools located in Dae Gu City and Kyeong Buk Province. The study has employed the experimental design of Task difficulty (2) × Anxiety (2) × Stress(2), which is a completely randomized factorial. The present work has the tool that wash used by Health & Rodger on the performenace of a motor learning. The sport Competition Anxiety which has been used in the present experimetns is a modification of Marten`s Sport Competiotion Anxiety. Data have been analyzed in terms of a three-way ANOVA. The concolusions drawn from the experiments are as follow: 1. There is a significant difference between easy task and hard task. 2. There is no significant difference between high SCAT group in the performance of a motor learning. 3. There is no significant difference between stress group and no-stress group in the performance of a motor learning. 4. There is no significant difference between task difficulty and anxiety in the performance of motor learning. 5. There is no significant difference between anxiety and stress in the performance of a motor learning.