On a display window that displays code patterns that are read at a time, a code reading device allows the code pattern that is successfully decoded to be visually confirmed with ease. In a handy terminal, when an image scanner reads code patterns at a time in response to a trigger operation, a CPU performs decoding processes for each code pattern and determines whether the decoding processes have been successfully completed or not based on the decoding results so as to display an identifying mark indicating the determination result in association with the image of each code pattern.