Inhaled therapy is the mainstay of asthma treatment due to its local and rapid action. However, its efficiency relies on the teaching of a good inhalation technique by health care providers. We assessed health care providers' knowledge and practical skills in the use of inhalation devices. An observational multicenter study was conducted in the pulmonology and paediatric wards in Marseille. The departments' common practices, theoretical knowledge and practical skills were assessed through a questionnaire and a demonstration using a spacer device. Forty health care providers were interviewed (9 attending physicians, 14 residents, 16 nurses and 1 physiotherapist), in 8 different pulmonology and paediatric wards. A total of 42.5% reported previous training in inhalation device technique. When evaluating theoretical knowledge, we found a mean of 54% correct answers. Attending physicians did significantly better than residents and nurses. With regard to practical skills, we found a mean of 1.12 failed steps out of 7. Here again attending physicians did significantly better than residents and nurses. Based on the results of our study, we recommend that attending physicians provide training of inhalation technique to nurses and residents, as they did significantly better theoretically and practically. Copyright © 2016 SPLF. Published by Elsevier Masson SAS. All rights reserved.