The aim of the study was to identify the differences between injured and non- injured athletes in the internal motivation for achievement . It also showed the effects  of the injury on the athlete's self-confidence and anxiety. The researcher chose (120)  players of the national teams in the Olympic Center in Maadi, and their ages range  from 13 to 17 years of (boxing, wrestling and karate). The researcher chose the  sample in a deliberate way from sports players (karate - wrestling - boxing) and it was  [95] players as a basic sample and (15) players as an exploratory sample. Method: The  researcher used the descriptive method "survey method". Results: the researcher  found out : There are statistically significant differences between injured and non- injured karate, wrestling and boxing players in the internal motivation to achieve for  non-injured athletes. Also, There are statistically significant differences between  injured and non-injured players in self-confidence for non-injured athletes . In  addition, There are statistically significant differences between injured and non- injured in anxiety for non-injured athletes in the dimension (self-confidence) and for  the injured athletes in my dimension (cognitive anxiety and physical anxiety)