 The aim of this study is to determine the validity of a self-questionnaire detecting seniors phobia of falling living at home. A prospective monocentric observational study compares in a blind way the presence of Diagnostic and Statistical Manual of Mental Disorders fourth edition DSM-IV criteria for specific phobia, considered as the gold standard to the score obtained at the detecting questionnaire for 70 years old seniors suspected of phobia of falling and attending geriatric day hospital at the Bretonneau hospital APHP, Paris. 