A sanatorium, also sanitarium or sanitorium, is a historic name for a specialised hospital for the treatment of specific diseases, related ailments and convalescence. Sanatoriums are often in a healthy climate, usually in the countryside. The idea of healing was an important reason for the historical wave of establishments of sanatoriums, especially at the end of the 19th- and early 20th centuries. One sought, for instance, the healing of consumptives especially tuberculosis or alcoholism, but also of more obscure addictions and longings of hysteria, masturbation, fatigue and emotional exhaustion. Facility operators were often charitable associations such as the Order of St. John and the newly founded social welfare insurance companies.

आरोग्य आश्रम उन संस्थाओं को कहते हैं जहाँ लोग स्वास्थ्य की उन्नति के लिए भरती किए जाते हैं। दीर्घकालीन रोगों की विशेष चिकित्सा करनेवाली संस्थाओं को भी बहुधा यह नाम दिया जाता है। जैसे टी.बी. सैनाटोरियम।