Pharmaceutical representatives are an important promotional tool for pharmaceutical companies. This cross-sectional, exploratory study aimed to determine pharmaceutical representatives' beliefs and practices about their professional practice in Sudan. A random sample of 160 pharmaceutical representatives were interviewed using a pretested questionnaire. The majority were male (84.4%) and had received training in professional sales skills (86.3%) and about the products being promoted (82.5%). Only 65.6% agreed that they provided full and balanced information about products. Not providing balanced information was attributed by 23.1% to doctors' lack of time. However, 28.1% confessed they sometimes felt like hiding unfavourable information, 21.9% were sometimes or always inclined to give untrue information to make sales and 66.9% considered free gifts as ethically acceptable. More attention is needed to dissemination of ethical codes of conduct and training about the ethics of drug promotion for pharmaceutical representatives in Sudan. . Seuls 65,6 % affirmaient fournir des informations exhaustives et objectives sur les produits. Selon 23,1 % d'entre eux, l'absence d'objectivité était imputable au manque de temps des médecins. Toutefois, 28,1 % avouaient qu'il leur arrivait d'avoir le sentiment d'omettre des informations négatives, 21,9 % avaient parfois ou toujours tendance à fournir des informations fausses pour réaliser des ventes et 66,9 % considéraient les cadeaux comme éthiquement acceptables. Il est nécessaire de prêter davantage d'attention à la diffusion des codes de bonne conduite chez les visiteurs médicaux soudanais et à leur formation sur l'éthique de la promotion des médicaments.