© 2022 AIPTLFThis article examines the place of emotions in mediated activity. The literature has shown that management tools produce emotions for users. However, this literature mainly analyses users in isolation and without taking into account their work context. Building on the work of Rabardel and 15 interviews with managers, this article shows how the emotions produced by the use of management tools transform the relationship to the activity, the relationship to oneself and the relationship to others and contribute to the transformation of the mediated activity. These results allow to underline the place of emotions in the mediated activity but also to discuss the relevance of the usual distinction between positive and negative emotions.