Measuring reader satisfaction is important in terms of adaptive of an academic library. The proliferation of Information Technology opens avenues foreasy accessibility of information and eliminates the need of physical library visits to satisfy information needs. The primary aim of this paper is to investigate the factors determining satisfaction of readers who use the VietNam National University of Forestry Library. The study was exploratory in nature and employed factor analysis to identify the important factors of reader satisfaction in relation to library facilities and services. Results revealed that five factors are considered important in determining reader satisfaction. Among those, most important factors are textBooks allowed for borrowing, digital library services, reading Tables & Chairs, opening hours and helpfulness of the Staff in the library.