Abstract: An apparatus for adapting an adult three-point seatbelt of a vehicle for safe and secure usage by an occupant such as a child, the seatbelt being of the ubiquitous type that comprises a tensioned belt wound on a drum that extends from above shoulder height of an adult occupant of a seat, to an anchor point connected to chassis of vehicle, and a clasp attached to the chassis on an opposite side of an occupant of the seat from the anchor point, such that the belt may be drawn downwards and across an occupant to engage the clasp, thereby restraining the occupant with both a sash section and a lap section of the seatbelt. The apparatus comprises a guide for the sash section of the seat belt that is fixed to a seat and sideways adjustable with respect to the occupant sitting on the seat, the sash guide for engaging the sash section above a shoulder of the occupant at a sideways position to ensure that said sash section runs over shoulder of the occupant in an optimal position for both comfort and safety.