A car seat holder is used to support a portable infant car seat by providing a flexible support. The apparatus comprises a first support, a second support, and a canvas. The first support and the second support are elongated members that extend across a shopping cart. The first support and the second support are rigid members that distribute the weight of an infant carriage device. The canvas is a flexible surface that extends from the first support to the second support across the shopping cart. The canvas provides a mechanism for transmitting the weight of the infant carriage device to the first support and the second support. In this way, the first support and second support hold the canvas in optimal position for holding an infant car seat. This arrangement frees up space within a shopping cart.