Aromatherapy is an integrative and complementary practice practiced for centuries, which uses essential oils for therapeutic purposes. These substances are products of volatile concentration from a plant-derived source and can be applied topically, inhaled and orally. The Lavander angustifolia It is used to improve sleep quality for its anxiolytic and sedative properties. Thus, the objective of this work is to verify the use of essential oil of Lavander angustifolia with aromatherapy, in improving sleep quality. A bibliographic review was carried out. The selection of research sources was based on publications found in databases such as PUBMED, Google academic and SciELO. Among the articles found, those dated between 2012 and 2022, and published in Portuguese and English, were selected. Some studies show positive results from the use of lavender essential oil in the quality of sleep due to the simple way of application and no adverse effects.