The biological aspects of the mango red mite, Oligonychue manglferus (R. & S.) studied on the different mango leaves varieties (Ewais, Zebda, Mabrruka, Alpha's, LangraBenares and Keitt) under the laboratory condition of 25t2⁰C temperature and 65±5% celative humidity. The biological aspects of mite, 0. mangiferus on the six mango varieties such as egg stage (Incubation period), immature periods, total developmental periods, life cycle, oviposition periods, pre-oviposition period, oviposition period, post-oviposibon period, adult's longevity, and adult's life span were approximately similar in all varieties, while, female's fecundity was significantly increased when mite fed on leaves of Kett and LangraBenares varieties than other mango leaves varieties (Ewais, Zebda, Mabrruka, and Alphons). Keitt mango variety was more favorable for 0. mangiferus development and fecundity than leaves of LangraBenares, Ewais, Alphons, Zebda and Mabrouka. Keitt leaves highly elongated the mite oviposition period, longevity and highly enhanced the female fecundity. These explain the fad that leaves of Keitt mango variety were more susceptible to mite infestation than other varsities.