The present work attempts to answer the question: what characterises a Muslim's behaviour in business life? The author answers by sayng that the Qur'an lays down a set of princiles to provide guidance for the conduct of a Muslim businessman. This guidance consists not merely of 'laws', but also of ethical norms. Thus a Muslim is urged not only to give others their due; rather to give even more than what one legally owes them so as to fulfil the requirements of benevolence and magnanimity.