INFORMATION TERMINAL DEVICE AND BIOLOGICAL SAMPLE MEASUREMENT DEVICE

In an information terminal device (100), a display component (2) displays, on the basis of commands from a controller (9), a plurality of character keys, an enter key (20) for entering input information including one or more characters inputted by selecting the plurality of character keys, and a selection marker indicating one of the plurality of character keys being selected. An input component (3) includes a select key (5) that causes the controller (9) to successively move the selection marker displayed on the display component (2) over the plurality of character keys so as to select one of the character keys, and a change key (8) that causes the controller (9) to change a display content of the display component (2). When the change key (8) has been operated in a state in which the input information is being displayed on the display component (2), the controller (9) moves the selection marker displayed on the display component (2) from the selected character key directly to the enter key (20).