Journal of Medical Internet Research - International Scientific Journal for Medical Research, Information and Communication on the Internet #Preprint #PeerReviewMe: Warning: This is a unreviewed preprint. Readers are warned that the document has not been peer-reviewed by expert/patient reviewers or an academic editor, may contain misleading claims, and is likely to undergo changes before final publication, if accepted, or may have been rejected/withdrawn. Readers with interest and expertise are encouraged to sign up as peer-reviewer, if the paper is within an open peer-review period. Please cite this preprint only for review purposes or for grant applications and CVs (if you are the author). Background: There is a growing prevalence of loneliness and social isolation among older adults. These problems are often associated to depressive states, cognitive decline, sleep disorders, addictions, and over-mortality. To limit loneliness and social isolation in older adults, some authors recommend the use of new communication technologies to maintain a social link with family members as well as with health and social care professionals. Amongst these communication tools, telepresence robots seem to be a promising solution. These robots offer users the possibility of making video calls with their relatives, social workers and health care professionals, in order to maintain social contact and access to support services whilst living at home. Nevertheless, telepresence robots have been relatively unstudied in real-life environments. Objective: This main objective of this study is to measure the impact of a 12-week intervention using a telepresence robot on the feeling of loneliness and on social isolation of older adults living at home. Its secondary objective is to establish recommendations for the implementation of telepresence robots in the studied context. Methods: : A non-randomized study will be conducted among sixty older adults living at home who will participate in the study for 24 weeks. During this period, they will host a telepresence robot for 12 weeks to use it in their home. After the end of the intervention a 12-week follow-up ensues. In total, four evaluations will be carried out over the entire experimental phase for each participant at Weeks 0, 6, 12, 24. A multidimensional assessment of the impact of the robot will be carried out using a multi-method approach including standardized scales and a semi-structured interview. This assessment will also help to identify the ergonomic aspects that influence the robot's usability and acceptability amongst older adults. Results: Data collection started in September 2020 and is expected to be completed in early 2023. In August 2022, 56 participants were recruited for the study. Data analysis will take place between August 2022 and is expected to be completed in early 2023. Conclusions: The DOMIROB study will provide new knowledge on the impact of social telepresence robots in older adults living at home. The results will make it possible to suggest technological, ethical, and organizational recommendations for the use and implementation of telepresence robots for older adults in real-life settings. Clinical Trial: Trial Registration: ClinicalTrials.gov Identifier: NCT04767100.