A work support device includes a first display control unit and a registration unit. The first display control unit performs control to display a label image having a message to a second user designated by a first user on a display screen relevant to the message. The registration unit takes the message as a task, and correlates and registers task information on the task with (i) display screen identification information to identify the display screen on which the label image is displayed and (ii) user identification information to identify the second user.