A method and device for displaying a document written in a Western language in a readable form without decreasing the utilization efficiency of a display screen. When a tail of a word to be displayed goes beyond an end of a line on the screen and the number of characters contained in the word does not exceeds a reference value, a line feed is inserted immediately before the word to perform word-wrapping, and when the number of characters contained in the word exceeds the reference value, a line feed is inserted halfway within the word to display divided parts of the word on different lines.