: Animism and Dynamism amongst the Achehnese Islamic Society. The Achehnese has been widely known to be religious society. Islamic religion plays an important role in leading the daily activities amongst the Achehnese. In reality, however, some pre Islamic believes still continue to developed in the society. This paper attempts to study the aspects of animism and dynamism believes in the Islamic society of Acheh, be they from the birth until death or the belief that is still preserved. This explorative research utilizes a qualitative approach. The study reveals that Achehnese Muslim thus far, though they adhere to religious teachings they still practise the beliefs inherited from their ancestors. They believe that certain object may have spiritual power and to be sought assistance, a belief categorized as innovation and imagination inherent in the form of belief indivisible in daily social lives.