The essential oils isolated by hydrodistillation from the leaves of two Eucalyptus gillii Maiden and E. microcarpa Subsp. macrocarpa Hook were analysed by GC and GC/MS. The main components identified in E. gillii oil were 1, 8-cineole (79.5%), trans-pinocarveol (8%) and α-pinene (2.7%), and in E. microcarpa were 1, 8-cineole (77.3%), a-pinene (5.6%) and terpin-1-ol (5.1%). Oils with high content of 1, 8-cineole are classified as a "eucalyptol or medicinal" type.