The present invention relates to an electronic apparatus having a displaying function in a housing unit thereof that is rotatable or can be opened/closed, and facilitates effective use of the displaying capacity in the lateral direction that the horizontally oriented screen elongated in the horizontal direction has. An electronic apparatus (a portable terminal apparatus 2) having a displaying function in a housing unit thereof that can be opened/closed or is rotatable, including a displaying unit 18 that displays a vertically oriented screen or a horizontally oriented screen 176, and a controlling unit (a CPU 90) that, when text information or information including a text is displayed in the displaying unit, sets a displaying column (a text displaying column 178) in the full lateral width that the horizontally oriented screen has and can be displayed, in the horizontally oriented screen 176 set on the displaying unit, and causes the information to be displayed in the displaying column.