After early adulthood, sleep architecture is being subjected to continuous modifications, and the changes produced are mainly consolidated before moving into an older age group. In parallel, there is an increase in incidence of the majority of sleep disorders, while the others, related to the slow-wave sleep which is becoming more and more short-term, are starting to disappear. Insomnia, narcolepsy, REM-sleep behavior disorder, obstructive sleep apnea, sleep-related movement disorders (restless leg syndrome and periodic leg-movements) are among the disorders requiring an especial attention in older people. For insomnia management, one can use the general principles of sleep hygiene and, for a period no longer than 4 weeks, the hypnotics act...