The care of the oral cavity is an important way to prevent local and systemic infections. This study aimed to: evaluate the use of video as a teaching strategy of oral hygiene for patients undergoing chemotherapy. The methodological design used was quasi-experimental before-after intervention. The sample consisted of 23 subjects who performed the technique of oral hygiene before and after watching an educational video. To do so was given a kit with a toothbrush with soft bristles, toothpaste with low abrasivity, mouthwash or product to mouthwash and dental floss for oral hygiene. For data analysis we applied the parametric test t "Student" paired.