Background: Evidence-based practice (EBP) appears promising in order to strengthen both interprofessional team work and the client´s involvement in his/her care processes. It is therefore of interest to implement EBP in the community care for the aged. But implementation is not always a simple and straightforward process; it may face resistance or difficulties. Factors such as usability, adaptations, barriers, fidelity, and anticipated impact need to be studied when implementing EBP in a new context. Aim: To evaluate the implementation of EBP in community health and social care for the aged in a Swedish setting. This includes the study of the implementation process as well as the impact of EBP on interprofessional teamwork and the care receivers' experiences of care quality. Methods: An explanatory case study in two urban districts in the city of Gothenburg, Sweden, where the implementation of EBP is delivered as a collaborative project with a tailored multifaceted implementation strategy. Data will be collected through documentary information, observations, focus groups, interviews, and a survey, and analyzed using both qualitative and quantitative methods. Results: The collaborative project is on-going with three facilitators using a multifaceted implementation strategy including cooperation between researchers and users, education/learning, and facilitation. Data collection has commenced. Initial experiences reveal that the introductory phase, containing time for persons involved in the collaborative project to get to know each other, each other's areas of expertise and respective organizations, took longer than expected. Also, different care-professions have experienced thus far conducted educational activities in different ways, and some express limited ability to prioritize project activities. Conclusion: The future results of this explanatory case study may be useful for gaining knowledge of and understanding the implementation of EBP in community care for the aged, and to improve the quality of care, support and rehabilitation of older persons.