The higher educational institutions are introducing and implementing Learning Management Systems (LMS) for effective communications with students and for adoption of technology based learning processes. However, the success of LMS depends mostly on instructors’ adoption of LMS. This study is incorporating different important factors with TAM to study the impacts of these factors on instructors’ behavioural intention to use LMS. A sample of 247 instructors was used for model testing. PLS-SEM technique was used as a testing method. The PLS-SEM results show that Task Technology Fit (TTF), Perceived Usefulness (PU) and Perceived Ease of Use (PEOU) have direct impacts on behavioural intention while TTF, Compatibility, Convenience, Self-Efficacy, Personal Innovativeness and Subjective Norm have significant impacts on PU and PEOU. Empirical findings of this research provide a better understanding for instructors’ adoption of LMS. In addition, the research highlights different aspects that lead towards successful adoption of LMS.