This project is on Teachers and students use of school library for developing reading culture in senior secondary schools. This study investigated the teachers and students’ use of school and class libraries for developing reading culture in senior secondary schools. The study employed a descriptive survey research design. An instrument titled: Teachers and students’ use of school and class libraries for developing reading culture in senior secondary schools (TSUSCLDRCSS) was used to collect relevant data for the study. The ten (10) secondary school involved were selected based on stratified sampling technique method and the statistical tools employed to analyse the data collected were percentages while the inferential statistics of chi-square(x2) was used to test the stated hypotheses at 0.05 level of significance. 175 sample sizes were used for the study. Four (4) research questions and four (4) research hypotheses were designed and formulated for the purpose of the study. The study revealed that there was a significant influence of school library in promoting reading culture among SSS teachers and students. It also revealed that there was a significant difference between the availability of books and the school library. The study also revealed that there was a significant influence of school library materials on SSS students and teachers. The study further revealed that there was significant difference between factors militating against the SSS teachers and students in developing reading culture in Lagos State. Based on the findings of this study, recommendations and suggestions were made for students, parents, lecturers and university administrators and relevant agencies for further research.