The purpose of this study was to evaluate the effects of circuit training on selected physical fitness components of male students’ football player on Alember preparatory school. The training which was given to the trainees was insufficient to develop endurance, agility, strength, flexibility and speed. Quais experimental research design was used for this study. The researcher selected 42 preparatory school male students with age range between 15-18years through simple random sampling method. This sample also grouped in to experimental (n=21) and control group (n=21) by using simple random lottery system. The experimental group engaged in exercise program (3days per week for 40-60 minutes in three months). However, the control group did not perform circuit training, both groups undergone normal football training program. The two groups took the test items included modified 8 levels sit up, 1miniut sit up, sit and reach, Illinois and 30mater dash run tests as pre and post-test. These test items used to determine muscular strength, muscular endurance, flexibility, agility and speed of the respondents. The data collected were analysed using statistical package for social sciences (SPSS) version 20 to evaluate the significance difference (P<0.05) of pre and post-test results of each variable. After analysis the pre-post mean difference of each variable the experimental group muscular strength, muscular endurance, flexibility, agility and speed improved significantly. This was due to the effects of circuit training on selected physical fitness component. Key words: circuit training, muscular endurance, muscular strength, flexibility, agility