Background and Aim: The studies have been suggested that 98% of accidents can be expected. Iran has developed that has been 33fold of developed countries of statistic of morality from accidents. According to statistics of Universal Health Organization, Iran has been got first position in driving accident all over the world. It’s incidence of accident and morality and malformation frequency and using drugs are not comparable to any countries. Therefore, this research has studied on susceptible factors and damages from motorcycle accidents in Mashhad. Materials and Methods: The present study is a descriptive study and Research Society has been all passengers of motorcycle that has presented for accident in Shahid Kamyab First Aid Hospital. According to studies, 400 patients are selected for research sample. In limited time of study, sampling of all bedridden patients in different parts has been performed on 2005. Questioners have been tested by using the recent Internet papers and library information and traffic police, officer's knowledge and kinds of damages and have been filled by questioners with interview, observation and record methods. Data Analysis has been done by necessary Statistical Tests and Software (spss11. 5) Results: The findings suggested that the most injured patients who present for motorcycle accidents have ranged from 21-30 years old. The most accidents have been happened for people who worked 6-10 hours at 24 hours before accidents. 76.6% of people have not used safety hat and all of dead did not have safety hat. 17.3% of people has been used drugs. 31.1% of Research Unites has been smoke cigarette. The most injures are happened in extremes.. The most method accidents have been lateral. 62.2% of Research Unites has been operated. The most frequency of accidents have been happened at 20 PM There is significant statistical relation between gender, workweek and injuries, kind of safety cover, using drugs, smoking cigarette and alcohol and morbidity and kinds of damages but there is not any significant statistical relation between transportation to hospital and accident model with injuries. Conclusion: According to results of research, statistics of motorcycle accidents and paroxysm and extension of damages from it is significant. The amount of using drugs, alcohol and cigarette in Research Unite is also privilege that they can be susceptible factors in accidents. Special education courses, observe the rules, enactment of law for driving motorcycle, obligatory using of safety hat and good production of parts of motorcycle and optimizing of productions and roads play important roles in decreasing statistics of traffic accidents. Also, cultural enrichment, promotion of awareness, situational actions, amusement facilities, new regulations and controlling borders and fighting with supplying drugs will decrease addiction and accident.