Introduction: In order to fight against preanalytical errors, a simulation workshop around the requirements of this phase was carried out by the team of the biochemistry laboratory of the university hospital of Tangier Tetouan Alhoceima. Newly recruited nurses in oncology, hematology and the sampling center benefited from this training. Material and Methods: The course of this workshop took place in the premises of the center of clinical simulation and educational innovation in health sciences of the faculty of medicine and pharmacy of Tangier (Tangier'Sim Center). The beneficiaries were 19 nurses divided into two groups. The practical part was performed on low-fidelity procedural dummies. Two questionnaires were completed pre and post training. Results and Discussion: Knowledge of the requirements and best practices of the pre-analytical phase improved significantly after this workshop, both in terms of preparing the patient and taking the sample. This approach is an original tool for training and familiarization with good practices for peripheral venous sampling, in particular the vacuum sampling system. And above all an opportunity to discuss the different requirements with a category of professionals very involved in their daily practice in the preanalytical phase. Conclusion: This experience resulted in the development of a leaflet on good practices for peripheral venous sampling which is part of the quality approach in the medical biology laboratory.