A neck rest for supporting the neck and head of a human being, comprising a right and a left elongate support member (2, 3), member wherein: - the neck rest further comprises a collapsible intermediate section interconnecting the right and left support members (2, 3), - the support members (2, 3) are adapted to extend in the human being's cranial-caudal direction and to support a right and a left portion of the back head and neck, - the neck rest is dimensioned to extend only behind the human being's ears, with no portion of the neck rest supporting or touching the human being's cheeks or jaws during use, - the support members (2, 3) are incompressible under the weight of the head of a human being, - at transitions between the intermediate section and the support members (2, 3), the support members (2, 3) define left and right edges for engaging the human being's neck and mastoid bones behind the human being's ears to provide a support for the human being's head when the neck rest is under pressure from the human being's head and neck, - each of the support members (2, 3) and the intermediate section is sufficiently bendable to conform to the natural contour of the left and right neck and head portions of the human being, and - the material characteristics of each of the support members (2, 3) are such that the support members (2, 3) provide a biasing force on the human being's occipital and mastoid bones during use of the neck rest, characterized in that the neck rest further comprises a holding mechanism for maintaining the support members (2, 3) in a bent position, the holding mechanism being adapted to be in a locked state, in which a selected bending of the support members (2, 3) is maintained, and in a released state, in which the support members (2, 3) are allowed to restore a non-bent shape, wherein the holding mechanism comprises at least one strap arranged along each of the support members (2, 3), and at least one releasable locking member mounted on each strap, and being adapted to releasably hold the strap(s) in a selected position, and wherein each releasable locking member is adapted to squeeze a portion of the corresponding strap, thereby preventing movements of the strap relative to the locking member, when the locking member is in a locking position, and wherein the strap is allowed to move relative to the locking member when the locking member is in a released position. - the neck rest further comprises a collapsible intermediate section interconnecting the right and left support members (2, 3), - the support members (2, 3) are adapted to extend in the human being's cranial-caudal direction and to support a right and a left portion of the back head and neck, - the neck rest is dimensioned to extend only behind the human being's ears, with no portion of the neck rest supporting or touching the human being's cheeks or jaws during use, - the support members (2, 3) are incompressible under the weight of the head of a human being, - at transitions between the intermediate section and the support members (2, 3), the support members (2, 3) define left and right edges for engaging the human being's neck and mastoid bones behind the human being's ears to provide a support for the human being's head when the neck rest is under pressure from the human being's head and neck, - each of the support members (2, 3) and the intermediate section is sufficiently bendable to conform to the natural contour of the left and right neck and head portions of the human being, and - the material characteristics of each of the support members (2, 3) are such that the support members (2, 3) provide a biasing force on the human being's occipital and mastoid bones during use of the neck rest, characterized in that the neck rest further comprises a holding mechanism for maintaining the support members (2, 3) in a bent position, the holding mechanism being adapted to be in a locked state, in which a selected bending of the support members (2, 3) is maintained, and in a released state, in which the support members (2, 3) are allowed to restore a non-bent shape, wherein the holding mechanism comprises at least one strap arranged along each of the support members (2, 3), and at least one releasable locking member mounted on each strap, and being adapted to releasably hold the strap(s) in a selected position, and wherein each releasable locking member is adapted to squeeze a portion of the corresponding strap, thereby preventing movements of the strap relative to the locking member, when the locking member is in a locking position, and wherein the strap is allowed to move relative to the locking member when the locking member is in a released position.