According to one embodiment, a code reading device includes: a camera including an image sensor with a plurality of image pickup elements, the camera being configured to pick up an image of a symbol attached to merchandise; a decision unit configured to decide a position of clipping in the image sensor, based on change information for changing a set position of clipping in the image sensor, when the change information is inputted; and an image processing unit configured to perform image processing on the symbol, based on an image by the image sensor corresponding to the decided position of clipping.