A headrest according to an embodiment of the invention in FIGS 2, 3 and 4 is constructed detachably in such a manner that {HEAD ~ the whole} of {TAIL ~ a main headrest body} 4 is made of a cushion like mass of soft material or at least the exterior part of the body 4 is detachably mounted to a headrest base 3 
A headrest according to an embodiment of the invention in FIGS 2 , 3 and 4 is constructed detachably in such a manner that { HEAD ~ the whole } of { TAIL ~ a main headrest body } 4 is made of a cushion like mass of soft material or at least the exterior part of the body 4 is detachably mounted to a headrest base 3
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