Abstract: An automatic sales slip register for credit card. This register imprints embossed characters of a submitted credit card on a sales slip when issuing the sales slip, thus to prevent issue of sales slip when no credit card is submitted. The main body of the register includes a card insert slit, a slant support block supporting a lower end of the credit card inserted in the card insert slit, a stopper preventing the card from sliding off the support block and guiding the card, a plant mounting plate mounted on the slant support block, an imprinting roller for imprinting embossed characters of the card on the sales slip, a roller drive unit for reciprocating the imprinting roller together with a roller support bracket, a printer head for printing other items on their respective blanks of the sales slip after imprinting of the embossed characters on the sales slip, and a sales slip feed sensor mounted on the support block in order for checking a feeding operation of the sales slip.