The Arab uprisings not only brought new political opportunities to the Arab world; it also brought a violent civil war to Syria, causing a flow of refugees into its neighbouring countries. The Jordanian Salafi organisation the Book and the Sunna Society (BSS) immediately started a massive campaign to bring relief to the Syrian refugees in their country, mobilising donors in their transnational network. Now they are one of the biggest native contributors to relief work among Syrian refugees in Jordan. Salafism usually draws negative attention from Western media and academia, due to some Salafi jihadi-terrorist groups efforts to wage war against the West. Rarely do we hear about their charitable efforts to help the poor and needy. This study aims to gain an understanding of Salafi efforts in the field of humanitarian aid. The main objective of the thesis is to analyse what are the BSS strengths and weaknesses when measured by international humanitarian standards, represented by the Code of Conduct for the International Red Cross and Red Crescent Movement and Non-Governmental Organizations (NGOs) in Disaster Relief (ICRC Code of Conduct). The study concludes that although the relief work presented by the BSS contains weaknesses when it comes to universality, impartiality, independence and professionalism, they have great strengths when it comes to respecting culture and customs and building their work on local capacities. Their indigenous character also gives them a great advantage by providing a large network of supporters and workers that contribute voluntarily, or at low costs, in a cultural and religious sensitive way. Thanks to their Salafi affiliation, they harvest support from like-minded groups in their trans-national network, most notably wealthy Gulf-based donor organisations. This way they utilise funds that would otherwise not reach the fields through conventional humanitarian organisations. Given that they are Salafi, one would expect a strong emphasis on the missionary side of their work. This assumption proved correct, from the fact that they have set up numerous mosques and a religious centre, holding courses on Sharia and the Quran. Still, their religious work does not hinder them from making a humanitarian contribution to the relief sector through meeting the basic needs of the refugees, like housing, health treatment, food, clothes, as well as psychological support through support centres for women and children. Their relief is above all conditioned upon need - not faith or religion, although these are the primary factors of motivation for their efforts in the field.