A device for impeding a person from assuming a supine position in bed or other resting support includes a cushion support and movement restriction means fixable at the cushion support and a user. The cushion support designed for being placed on a resting support such as a bed. When users head is resting on a cushion disposed on or in the cushion support, the user cannot turn from one lateral position to the other lateral position via a supine position but may turn so via an abdominal position. The cushion support includes a flexible cover and a stiffening means disposed in the cover. The stiffening means can be inserted into the cover and removable therefrom. The device includes also first connection means having an extension in the cover in the transverse direction thereof and an extension outside the cover at both sides of the user. The first connection means is coupled with the stiffening means for connection of the movement restriction means.
