The Sandman is a mythical character in Western and Northern European folklore who puts people to sleep and brings good dreams by sprinkling magical sand onto their eyes.
Representation in traditional folklore
The Sandman is a traditional character in many children's stories and books. In Scandinavian folklore, he is said to sprinkle sand or dust on or into the eyes of children at night to bring on sleep and dreams. The grit or "sleep" (rheum) in one's eyes upon waking is the supposed result of the Sandman's work the previous night.
E. T. A. Hoffmann (1776–1822) wrote a short story in 1816 titled Der Sandmann, which showed how sinister such a character could be made. According to the protagonist's nurse, he threw sand in the eyes of children who wouldn't sleep, with the result of those eyes falling out and being collected by the Sandman, who then takes the eyes to his nest on the Moon and uses them to feed his children. The protagonist of the story grows to associate this nightmarish creature with the genuinely sinister figure of his father's associate, Coppelius. In Romanian folklore there is a similar character, Moș Ene (Ene the Elder). Hoffmanns version of the sandman is also similar to the French Canadian character known as the bonhome Sept-heur (seven o’clock guy), who, in some versions, throws sand in children’s eyes to blind them so he may capture them. Contrarily to the sandman, his bag is the place where he traps children who don’t go to bed. 
Hans Christian Andersen's 1841 folk tale Ole Lukøje introduced the Sandman, named Ole Lukøje, by relating dreams he gave to a young boy in a week through his magical technique of sprinkling dust in the eyes of the children. "Ole" is a common Danish first name and "Lukøje" means "close eye".  Andersen wrote:
There is nobody in the world who knows so many stories as Ole-Luk-Oie, or who can relate them so nicely. In the evening, while the children are seated at the table or in their little chairs, he comes up the stairs very softly, for he walks in his socks, then he opens the doors without the slightest noise, and throws a small quantity of very fine dust in their eyes, just enough to prevent them from keeping them open, and so they do not see him. Then he creeps behind them, and blows softly upon their necks, till their heads begin to droop. But Ole-Luk-Oie does not wish to hurt them, for he is very fond of children, and only wants them to be quiet that he may relate to them pretty stories, and they never are quiet until they are in bed and asleep. As soon as they are asleep, Ole-Luk-Oie seats himself upon the bed. He is nicely dressed; his coat is made of silken fabric; it is impossible to say of what color, for it changes from green to red, and from red to blue as he turns from side to side. Under each arm he carries an umbrella; one of them, with pictures on the inside, he spreads over the good children, and then they dream the most beautiful stories the whole night. But the other umbrella has no pictures, and this he holds over the naughty children so that they sleep heavily, and wake in the morning without having dreams at all.
The East German stop motion children's television programme Unser Sandmännchen (Our Little Sandman), based on Hans Christian Andersen's Ole Lukøje character and the story by E. T. A. Hoffmann has been broadcast since 1959, along with a West German version which was discontinued after reunification.
Fantasy writer Neil Gaiman wrote a 75-part comic book series called The Sandman for Vertigo Comics. The original series ran from 1989 to 1996. It tells the story of Dream of the Endless, who rules over the world of dreams. He is an anthropomorphic personification of dreams known to various characters throughout the series as Morpheus, Oneiros, the Shaper of Form, Lord of the Dreaming, the Dream King, Dream-Sneak, the Cat of Dreams, Murphy, Kai'ckul, and Lord L'Zoril. He possesses three symbols of office: a helm, an amulet known as the Dreamstone, and a sand pouch.
A comics adaption of the above mentioned German TV show Unser Sandmännchen has also been published.
Songs based on the figure of the Sandman include the 1950s classic "Mr. Sandman", Roy Orbison's "In Dreams" in which the singer is put to sleep by "A candy-colored clown they call the sandman" to dream of his lost love, and Metallica's "Enter Sandman" whose lyrics "juxtapose childhood bedtime rituals and nightmarish imagery", and originally included a reference to crib death. The Sandman also appears in the version of the lullaby "Morningtown Ride" recorded by The Seekers . and is mentioned briefly in the song “Headfirst Slide Into Cooperstown On A Bad Bet” by Fall Out Boy.
- Wee Willie Winkie – A Scottish nursery rhyme's personification of sleep
- Morpheus – Greek God of Dreams
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- James Hetfield. When Metallica Ruled the World (TV Documentary). VH1. Archived from the original on January 30, 2016. Retrieved August 20, 2016.
Extras – "James On Writing "Enter Sandman" Lyrics, 2004; When Ruled the World
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- Media related to Sandman at Wikimedia Commons