Structure of card reader

The utility model discloses a structure of a card reader. The card reader is provided with a shell body, wherein one end of the shell body is provided with a card inserting slot for a memory card to insert, and the other end is provided with a USB plug; a circuit board arranged in the shell body is respectively connected with the card inserting slot and the USB plug, wherein the circuit board is provided with a light source, and the shell body is provided with a light penetrating panel at the place which is opposite to the light source; the panel is provided with patterns or literals which are displayed by the projection of the light source on the panel, so that when the card reader is used for reading cards, a small light is used for indicating operating state and the utility model has multiple variations.