<b><i>Background:</i></b> The use of feeding tubes (FTs) in patients with advanced dementia does not yield positive health outcomes and can have a negative effect. <b><i>Methods:</i></b> A cross-sectional study assessed the knowledge and attitudes of physicians on the use of FTs for patients with advanced dementia. <b><i>Results:</i></b> 201 of 240 doctors (83.8%) participated in the study; 61.7% of the doctors claimed that FTs prevent aspiration, 51.7% that they prevent pneumonia, and 38.8% that they prevent weight gain. Almost one-third (32.3%) said that the decision to use FTs could be taken by a hospitalist or a primary physician (28.9%). <b><i>Conclusion:</i></b> We found large gaps in knowledge among doctors about the use of FTs and consequences in patients with advanced dementia.