The allowed danger theory, which originated from the theory of social worthiness, are the justification grounds of some sports injury behaviors. Sports injuries caused within sports rules fall into legitimate behavior and should not be convicted. The behaviors of violating sports rules and committing injuries by mistakes belong to allowed danger, and it is not proper for such behaviors to be convicted. Violating sports rules and committing injuries on purpose exceed allowed danger and such behaviors can be convicted. Injuries caused by non‐sports purpose behaviors should be convicted.