The invention relates to a rolling mechanism between a drawer and a shell in a cashier box, which comprises a pair of slideways which are arranged in the inner wall of the shell and idler wheels which are arranged on the drawer and matched with the slideways, wherein the two sides of the front end of the drawer are respectively provided with a support, the idler wheels are arranged on the corresponding supports and positioned below the drawer, and the two slideways are respectively arranged at the corners of the inner bottom of the shell. The idler wheels are positioned at the bottom of the drawer, accordingly, the width of the drawer can occupy as much the inner width space of the shell as possible, more sorts of currencies can be distributed, and the utilization rate of the shell space can be improved.