This paper determines the influence of school's physical facilities on students' achievement. The study was quantitative in nature and survey technique was used. The sample of the present study was selected by multi-stage random sampling method from Sahiwal division of Punjab, Pakistan. The researcher developed and validated a Check-List for Physical Facilities (CLPF) prior to data collection. Multiple regression analysis are run in the current research to analyze data. Measurement of the achievement of students from test scores of grade 8th conducted by Punjab Examination Commission in the year 2017 is analyzed. The study shows that ventilation, plants, play grounds, first aid medical box, LCD/LED significantly influenceed students' achievement. All the physical facilities contributed about 15.4% towards students' academic achievement.