The present article, after evaluating Ibn Rushd’s criticisms and disparagements levelled against Avicenna and comparing and contrasting their schools of philosophy in relation to four issues of ‘differing existence from quiddity’, ‘possibility and necessity’, ‘emanation or procession’, ‘the principle of the one’, concludes that notwithstanding the fact that Ibn Rushd has laboured and speculated meticulously upon comprehending Aristotle’s school of philosophy, he seems not to have made the same efforts in understanding Avicenna’s school and his criticisms, in some cases, are based on a fundamental misunderstanding and misinterpretation of Avicenna’s school of philosophy.