Aim: Pre-hospital emergency health services include the first assessment and treatment of patients in need of emergency assistance, and their transfer to the appropriate hospital with appropriate transport methods. Ambulances and medical equipment and devices are also adapting to the continuous developments in technical equipment, and healthcare professionals serving in this field are also engaged in a continuous adaptation study. Ergonomically, "health worker -ambulanceequipment used" compliance is of great importance in terms of work efficiency. One of the most reliable indicators of this harmony is the opinions of the healthcare professionals. In this study, it was aimed to develop a scale that can evaluate the ergonomics of emergency ambulances in a valid and reliable with the opinions of healthcare professionals.Material and Methods: In the study, which was structured in a descriptive style, a 48-item candidate item pool was obtained by applying open-ended questions from healthcare professionals to obtain candidate scale items. In the first application made with the candidate items obtained, data were collected from 361 healthcare professionals and explanatory factor analysis was performed. In the second application, confirmatory factor analysis was performed 3 by collecting data from 402 personnel. SPSS 26.0 and AMOS statistical software were used in the analysis of the data.Results: As a result of the analyzes made, the Ergonomic Evaluation Inventory of Emergency Ambulances (AYAEADE) consisting of 48 items and containing four sub-titles was obtained. In terms of sub-headings, reliability values were determined as 0.915 for Cabin General Features, 0.891 for Stretcher and Stabilization Equipment, 0.927 for Medical Devices and Equipment, and 0.850 for Personnel Safety.Conclusion: It was concluded that the inventory that emerged in this study measures the ergonomics of emergency ambulances in a valid and reliable way with the opinions of healthcare professionals. It is thought that the developed inventory will contribute to the literature on this subject and that it will contribute to the development of emergency ambulance designs and models in the future by enabling the evaluation of emergency ambulances from an ergonomic point of view with the opinions of the personnel.