A structure of a card gate mechanism in a card reader of, e.g., an ATM (automated teller machine). In order to constitute a gate opening (3) of a card gate mechanism (1), a gate frame (4a, 4b) which includes a wide-open portion (5) which leads a card (2) to a card carrying path (14) by using a material which transmits light is provided on at least one surface side of the card (2), and a light source portion (6) which irradiates the gate frame (4a, 4b) with the light is provided, thereby causing the wide-open portion (5) to shine by emitting the light from the light source portion (6). In this case, when a part of the gate frame (4a, 4b) is formed as a lens portion (9), a direction of light irradiation can be controlled, thereby alleviating irregularities in an element.