Multi-position headrest and seat provided with such a headrest

The head rest (1) consists of a cushion, carried by a spindle (5, 7), mounted on the seat. The cushion is mobile, in rotation relative to an axis (6), fixed relative to the spindles, between an upright position and a position folded forwards. The head rest can be locked in the upright position and is fitted with a mechanism, which allows the head rest to be released and moved into the folded forward position.