A card reader for use with a card, the card reader may include a magnetic detector to detect magnetism from the card inserted into an insertion port; a main body part including a card conveyance path; and a card detection sensor structured to detect a tip end of the card. The magnetic detector and the card detection sensor may be disposed at a distance less than a length of the card in the insertion direction. The card reader may further include a control unit that monitors magnetism detected by the magnetic detector when the card detection sensor detects a tip end of an insert inserted into the insertion port, and detects that an object other than the card has been inserted when a movement distance of the insert in a period in which the magnetism is undetected by the magnetic detector is a predetermined value or more.