various embodiments related to a card reader are described . according to an embodiment , the card reader comprises : a card reader body part ; a contact card recognition module included in the card reader body part ; a circuit board having a contactless card recognition module included in the card reader body part ; a card insertion hole which is formed in the card reader body part and allows a contact card and a contactless card to be inserted ; and a rotation guide part rotatably provided within the card insertion hole , wherein the rotation guide part may recognize the contact card in the contact card recognition module by passing the contact card through the card insertion hole according to a rotation , and may recognize the contactless card in the contactless card recognition module by limiting a movement according to a contact after inserting the contactless card into the card insertion hole . in addition , various other embodiments are possible .