Vehicle seat adapter for a vehicle seat of a vehicle, comprising: - an attachment device for attachment to a vehicle seat, and - a main body comprising a main body's vehicle seat side and a main body's person side as well as a main body's vehicle seat surface side and a main body's vehicle seat headend side, wherein, - the distance between the main body's vehicle seat surface side and the main body's vehicle seat headend side is smaller than the distance between the seat surface of the vehicle seat and the vehicle seat headend of the vehicle seat and/or the attachment device is configured for an attachment of the main body to the vehicle seat such that the main body's vehicle seat surface side is spaced apart from the vehicle seat surface of the vehicle seat such that space can be provided between the main body's vehicle seat surface side and the vehicle seat surface side of the vehicle seat; and - wherein the vehicle seat adapter is approximately cuboid-shaped and is dimensioned, when arranged as intended, to extend from about a pelvic region of a vehicle occupant to a head region of the vehicle occupant, characterized in that - the attachment device comprises an attachment means and an attachment structure, - the main body comprises a head portion on its main body's vehicle seat headend side facing away from the vehicle seat, - the attachment structure is formed as an extension below the head portion, and - the attachment means is a belt or rope in order to attach the vehicle seat adapter on the vehicle seat by means of engagement below the extension and surrounding the vehicle seat headend side of the vehicle seat. - an attachment device for attachment to a vehicle seat, and - a main body comprising a main body's vehicle seat side and a main body's person side as well as a main body's vehicle seat surface side and a main body's vehicle seat headend side, wherein, - the distance between the main body's vehicle seat surface side and the main body's vehicle seat headend side is smaller than the distance between the seat surface of the vehicle seat and the vehicle seat headend of the vehicle seat and/or the attachment device is configured for an attachment of the main body to the vehicle seat such that the main body's vehicle seat surface side is spaced apart from the vehicle seat surface of the vehicle seat such that space can be provided between the main body's vehicle seat surface side and the vehicle seat surface side of the vehicle seat; and - wherein the vehicle seat adapter is approximately cuboid-shaped and is dimensioned, when arranged as intended, to extend from about a pelvic region of a vehicle occupant to a head region of the vehicle occupant, characterized in that - the attachment device comprises an attachment means and an attachment structure, - the main body comprises a head portion on its main body's vehicle seat headend side facing away from the vehicle seat, - the attachment structure is formed as an extension below the head portion, and - the attachment means is a belt or rope in order to attach the vehicle seat adapter on the vehicle seat by means of engagement below the extension and surrounding the vehicle seat headend side of the vehicle seat.