: Islamist Movement in the Post-New Order Era West Sumatra. Islamist movement or radicalism emerges not only due to the literal understanding of verses of the Qur\u27an nor is it political, social and economic factors but it rather due to inappropriate reading of Islamic history combined with an excessive idealization of Islam in a given time. This writing tries to unveil how historical factor of local movement had contributed to the emergence of radicalism. This study uses a historical approach, by understanding the chronology and the process of the emergence of Islamic radicalism in the post-New Order West Sumatra. The writer argues that the emergence of Islamic radicalism is open even wider when it generated with the desire to repeat the period of Islamic glory without a comprehensive assessment of Islam and Muslim society. He also argues that Islamic radicalism movement in West Sumatra has a close historical bond with that of the 19th century Paderi