This study´s objective was to identify the effectiveness of bed bath video during simulation in the performance of undergraduate student skills. Method. This is a randomized, blinded clinical trial. The sample consisted of students of the second year of nursing graduation who were divided into two groups: intervention group (students who simulated bed bath using the video) and control group (students who simulated bed bath without the video). The primary end point was the performance of the students' abilities about bed bath procedure, which was evaluated in two moments (before and after the simulation) and we used a previously elaborated and validated checklist. Prior to the collection, the research project was submitted to the Research Ethics Committee and the data was collected after its approval.