The research aims to identify psychological endurance and its relationship to emotional balance and focus of attention among the karate rulers. The researcher used the descriptive method. The research community are the referees of karate sport registered in the Egyptian Karate Federation، They number (145) referees of all degrees (international-continental-first-second-third). a random sample was chosen from them، so that the total sample of the basic research is (55) judges from different groups and from the whole community. a random sample was selected to conduct the survey on a sample of (25) judges from different categories and from outside the basic sample. Also، (65) judges were excluded (for not completing the questionnaire - for not being able to communicate with them). Among the research tools: the psychological endurance scale prepared by Duaa Farouk Muhammad، the emotional balance scale prepared by the researcher. Attention focus scale this scale was prepared by Weinberg and Richardson (1990)، and Muhammad Hassan Allawi (1998) Arabized the scale. The most important results were: 1. There is a positive, statistically significant correlation at a significant level of 0.05 between the dimensions of the psychological endurance scale and the dimensions of the emotional balance scale. 2. There is a positive, statistically significant correlation at a significant level of 0.05 between the dimensions of the psychological endurance scale and the attention focus scale. 3. There is a positive, statistically significant correlation at a significant level of 0.05 between the dimensions of the emotional balance scale and the attention focus scale. 4. There are statistically significant differences between the categories of karate rulers (international - continental - first degree - second degree - third degree) in the variables under study (psychological endurance, emotional balance and attention focus).