A padded strap is attached to both sides of a child car seat using two sets of hook and loop type fasteners, and alternatively, through use of two rotating discs. A child car seat head support system is thereby provided, which holds a baby's head in a comfortable, upright position while sleeping in a forward facing car seat. Stabilized support is accomplished using the padded strap to gently hold the child's head in an upright position against the back of the child's car seat. The support mechanism prevents the child's head from falling forward or “rolling” to the left or right side while the child is asleep. In an alternative embodiment, the padded strap is attached at both free ends to a tension strap with two sets of fasteners, respectively; thereby forming a single, circular strap, operable for placement over the top of the car seat. The circular strap is held in position by the tension force applied by the elastic material of the padded strap, and the resulting friction applied between the circular strap and the outside of the car seat. The circumference of the circular strap may be adjusted with the two sets of fasteners, preferably hook and loop type, to accommodate various car seats, strollers, booster seats, and the like.