The paper examined academic self-concept as it correlate to use of library resources by undergraduates in Tai Solarin University of Education, Ijagun. The study employed a correlational survey research design. The population of the study consist of 3,544 undergraduates registered users of Otunba Gbenga Daniel Library, TASUED. Simple random sampling technique was used to select 248 sample from the population. Four research questions and one hypothesis guided the study. The data collected was analyzed using frequency distribution table and percentage for research questions and Pearson Product Moment Correlation was used to test the hypothesis at 0.05 level of significance. The correlational coefficienct (r 0.615) shows a strong relationship between academic self-concept and use of library resources by undergraduates. The study revealed that majority of the undergraduates possess positive self-concept towards their academic; there is high level of utilization of library resources by undergraduates; however the number of registered library users compared to the number of undergraduate students shows non useof library resources by over 70% of the students, the major problems affecting utilization of library resources by undergraduates include; Power outage, insufficient internet access points, obsolete books, delay in receiving requested materials, lack of library orientation, Non-challant attitude of the library staff and short duration of book loan. The study recommended that programmes that will enhance the academic self-concept of students should be organized, library visit should be made compulsory, user education should be enhanced to improve the use of library resources.