A Study on the end breakages in ring spinning by simple mathematical model has been carried out. The most important factors such as yarn strength, yarn strength variation, spinning tension and spinning tension variation were considered among the factors known as affecting the breakage phenomena. The relative importance of such factors was investigated and the number of end breakages based on the mathematical model was calculated. From the theoretical results, it could be concluded that the value of end breakage rate is obtained and the most important factor contributed to breakages is yarn irregularity.