A card processing apparatus detects an insertion/non-insertion of a card and a position of an inserted card regardless of any existence/non-existence of an opaque part on any position of the card. A first card detector is disposed at a first position in a conveying path, a second card detector is disposed at a second position after the first card detector, and a third card detector is disposed at a third position in the conveying path. A conveying mechanism is controlled by detection signals outputted from the first to third card detectors. Each of the card detectors include an operating member movable from a standby position to a shifted position due to contact with the card. A sensor detects any displacement of the operating member, wherein one of the detection signals provides a detection/non-detection of a card, an insertion or non-insertion of a card and an inserted card position.